Products

3000520 Heavy Duty Engine Oil Filter The 3000520 engine oil filter is a premium aftermarket lubrication filter manufactured according to heavy-duty vehicle industrial standards, specially designed for large diesel trucks, passenger coaches, construction machinery and stationary diesel generator units. During long-time heavy-load driving and continuous operation, engine lubricating oil will mix with metal wear debris, carbon deposits, sludge, dust and tiny impurities produced inside the engine. These pollutants circulating in the lubrication system will cause serious wear to bearings, crankshafts, pistons and other precision core components, leading to unstable oil pressure, insufficient power, loud engine noise, shortened service life and frequent mechanical breakdowns. This 3000520 filter adopts multi-layer gradient composite filtration structure to efficiently capture fine solid contaminants, always keeping the circulating engine oil clean. It ensures smooth oil supply and stable lubrication effect, greatly reducing internal engine friction wear and cutting unnecessary maintenance costs. With strict quality control in production, it can maintain stable filtration efficiency under high oil pressure and high-temperature working conditions, becoming an essential protective part for logistics fleets, engineering vehicles and industrial power equipment running in complex working environments all year round.  Product Material Description: Filter Media: High-density multi-layer composite fiber filter paper with dense pleats, stable filtration precision, large dirt holding capacity and excellent compatibility with various diesel engine oils; Outer Shell: Thickened high-strength cold-rolled steel housing with electrophoretic anti-rust coating, resistant to oil corrosion, external impact and outdoor scratch damage; Sealing Ring: Premium nitrile rubber (NBR), featuring outstanding high temperature resistance, oil resistance and anti-aging performance, achieving tight sealing without oil leakage under long-term compression; Internal Reinforced Metal Skeleton: Galvanized supporting frame prevents filter element collapse and deformation under sustained high lubricating pressure; Built-in Silicone Anti-Drain Valve: Prevents engine oil backflow after shutdown effectively, avoiding dry start wear of engine core parts.

3000120 Heavy Duty Engine Lube Oil Filter  The 3000120 engine oil filter is a high-performance aftermarket replacement component designed for heavy-duty diesel commercial vehicles, engineering machinery and stationary industrial diesel engines. During long-distance transportation and continuous heavy-load operation, engine lubricating oil will accumulate metal wear debris, carbon deposits, dust, sludge and fine impurities generated inside the engine. Circulation of these contaminants in the lubrication system will cause abrasion to bearings, crankshafts, pistons and other precision core parts, resulting in increased engine noise, power drop, oil pressure instability, shortened engine lifespan and frequent breakdowns. This 3000120 filter adopts multi-layer gradient filtration technology to efficiently trap tiny solid pollutants in lubricating oil, maintain long-term cleanliness of engine oil, guarantee smooth oil circulation and stable lubrication effect, effectively reduce internal engine wear and lower maintenance costs. Manufactured in strict accordance with automotive heavy-duty industry standards, it maintains stable filtration efficiency under high oil pressure and high-temperature working environments, serving as a reliable protective barrier for fleets, logistics trucks and engineering machinery working in complex and harsh working conditions all year round.  Product Material Description: Filter Medium: High-density composite fiber filter paper with compact pleated structure, featuring stable filtration precision, large dirt holding capacity and excellent compatibility with all types of diesel engine oil; Outer Housing: Thickened high-strength cold rolled steel shell with electrophoretic rust-proof coating, resistant to engine oil corrosion, external impact and outdoor scratch damage; Sealing Gasket: High-quality nitrile rubber (NBR), with outstanding high temperature resistance, oil resistance and anti-aging performance, realizing full sealing without oil leakage under long-term compression; Internal Reinforced Metal Skeleton: Galvanized support frame prevents filter element deformation and collapse under sustained high lubricating oil pressure; Built-in Silicone Anti-Drain Back Valve: Effectively avoids oil backflow after engine shutdown to prevent dry start wear on engine components.

1R-0762 Heavy Duty Engine Oil Filter The 1R-0762 engine oil filter is a high-standard aftermarket replacement filter manufactured strictly according to Caterpillar OEM standards, widely applied to CAT excavators, loaders, bulldozers, diesel generators and various heavy-duty industrial diesel engines. During long-time heavy-load operation, engine lubricating oil will inevitably mix with metal wear debris, carbon deposits, dust, sludge and tiny impurities produced by internal engine operation. If these contaminants circulate in the lubrication system, they will cause severe abrasion of crankshaft, bearings, piston and other precision moving parts, lead to engine noise, insufficient power, shortened engine service life and frequent mechanical failures. This 1R-0762 oil filter adopts advanced multi-layer gradient filtration technology to efficiently intercept fine impurities in engine oil, keep lubricating oil clean all the time, ensure stable and smooth oil circulation, greatly reduce internal engine wear, maintain normal engine temperature and lubrication efficiency, and effectively extend the overhaul cycle of engineering equipment. Made under strict heavy-duty machinery production specifications, it maintains stable filtration performance under high oil pressure and high-temperature working conditions, which is an essential protective component for construction machinery, mining equipment and fleet engineering vehicles running continuously in harsh working environments.  Product Material Description: Filter Medium: High-density composite glass fiber filter paper with dense pleated structure, featuring stable filtration precision, high dirt holding capacity and excellent oil compatibility; Outer Shell: Thickened high-strength cold-rolled steel plate with electrophoretic anti-rust coating, resistant to oil corrosion, external impact and outdoor scratch damage; Sealing Gasket: Premium nitrile rubber (NBR), outstanding high temperature resistance, oil resistance and anti-aging performance, tight sealing without oil leakage under long-term compression; Internal Reinforced Skeleton: Galvanized metal supporting frame, effectively prevents filter element collapse under high lubrication oil pressure; Anti-backflow Valve: Built-in silicone check valve, which can effectively prevent oil backflow after engine shutdown to avoid dry start wear.

1R-0751 P551314 Heavy Duty Diesel Fuel Filter The 1R-0751 cross-referenced P551314 fuel filter is a premium aftermarket replacement filter designed to match Caterpillar original specifications, widely used on CAT excavators, loaders, bulldozers, generators, heavy-duty trucks and stationary industrial diesel engines. Diesel fuel commonly contains water, rust, sludge, sand and fine metal particles during storage and field operation on construction sites. These contaminants easily scratch fuel injectors, block fuel lines, wear fuel pumps, cause weak power output, rough running, difficult cold starting and excessive fuel consumption. This filter adopts multi-layer gradient filtration technology to capture solid impurities effectively and isolate free water from fuel, delivering consistently clean fuel to the engine injection system. It safeguards delicate precision fuel components, stabilizes engine performance under continuous heavy-load work, reduces unexpected downtime and repair costs, and delivers long-lasting stable filtration performance even in dusty, humid and high-temperature harsh working environments. Manufactured following strict international heavy-duty machinery industry standards, it is a reliable, cost-effective substitute for original OEM filters for construction fleets, mining equipment and commercial diesel power units.  Product Material Description: Filter Media: High-efficiency multi-layer glass fiber composite filter paper, with stable pore size, high filtration accuracy and outstanding dirt holding capacity; Outer Housing: Thickened high tensile cold rolled steel shell with electrophoretic anti-rust coating, resistant to diesel corrosion, impact and outdoor abrasion; Seal Gasket: High-grade nitrile rubber (NBR), resistant to oil, high temperature and low temperature aging, maintaining tight sealing without leakage; Internal Support Skeleton: Galvanized reinforced metal frame, prevents filter element collapsing under long-term high fuel pressure; Precision Thread Interface: CNC machined thread consistent with OEM standards for seamless mounting.

117010-E9300 OEM Diesel Fuel Filter The 1117010-E9300 fuel fine filter is an original standard aftermarket replacement filter specially developed for Dongfeng Dragon DDi11 series national six diesel engines, widely matched to Dongfeng heavy-duty commercial trucks. During long-distance transportation and harsh working conditions, diesel fuel will inevitably mix with water, rust particles, sediment, dust and tiny metal impurities, which will cause injector blockage, fuel pump wear, insufficient engine power, unstable idle speed, difficult cold start and increased fuel consumption seriously. This filter adopts advanced multi-layer gradient filtration technology to efficiently trap solid contaminants and separate tiny moisture inside diesel fuel, delivering ultra-clean fuel to the engine fuel system steadily. It effectively protects precision fuel injection components, stabilizes engine dynamic performance, reduces failure rate obviously, and supports long service life up to 100,000 kilometers under normal driving conditions. Produced under strict ISO automotive manufacturing standards, it maintains stable filtration efficiency under high pressure and wide temperature fluctuation, becoming an essential reliable protective part for daily logistics transportation and heavy-load engineering operation of medium and heavy trucks.  Product Material Description: Filter Medium: High-density imported composite glass fiber filter paper with gradient pleated structure, featuring high dirt holding capacity and stable filtration precision; Outer Housing: Thickened cold-rolled steel shell with full anti-rust electrophoretic coating, resistant to diesel corrosion, external collision and scratch damage; Sealing Gasket: High-performance nitrile rubber (NBR), excellent oil resistance, low temperature resistance and anti-aging performance, zero leakage under long-time sealing compression; Internal Reinforced Skeleton: Galvanized metal support frame, prevents filter element deformation under sustained high fuel pressure; Thread Interface: Precision machined internal thread with standard size, consistent with original OEM installation structure perfectly.

W0035 High Efficiency Automotive Fuel Filter The W0035 Diesel Fuel Filter Water Separator is a high-quality aftermarket replacement part designed for diesel engines used in trucks, light commercial vehicles, construction equipment and small marine machinery. Dirty diesel fuel often contains water, rust, sediment, dust and fine solid particles, which easily cause fuel injector clogging, fuel pump wear, engine power loss, rough idling, hard starting and higher fuel consumption. This W0035 filter provides effective multi-stage filtration and excellent water separation performance to remove impurities and moisture from diesel fuel, delivering cleaner fuel to the engine fuel system. By improving fuel cleanliness, it protects precision engine components, stabilizes engine operation, reduces mechanical failure risks, and extends engine and fuel system service life. Manufactured with strict quality control standards, this filter features stable filtration efficiency, strong pressure resistance and great environmental adaptability, serving as a cost-effective and reliable replacement part for daily transportation and heavy-duty working conditions.    Product Material Description: This W0035 fuel filter adopts premium industrial-grade materials for long-lasting performance. The filter element is made of high-density multi-layer composite fiber filter paper with uniform pore structure, offering high filtration accuracy and large dirt holding capacity. The outer shell uses thickened high-strength steel plate with anti-rust and anti-corrosion coating to resist oil erosion, external impact and daily wear. The sealing ring is made of high-toughness nitrile rubber (NBR), featuring excellent oil resistance, low and high temperature resistance and anti-aging ability to ensure tight sealing without leakage. The internal reinforced metal support frame prevents filter element deformation under long-term high fuel pressure, and the professional hydrophobic separation layer ensures efficient water and fuel separation.  

SC880102 WDK999/1 Spin-On Diesel Fuel Filter SC880102 is the aftermarket equivalent part number fully interchangeable with original Mann Filter WDK999/1, cross referenced with OEM code 1117011-630-0000W and Donaldson P550004. It is a high-efficiency spin-on fine diesel fuel filter specially developed for FAW Xichai Aowei series engines, Weichai WP6 and Deutz common rail diesel engines widely equipped on FAW J6P, JH6 heavy-duty trucks, medium commercial vehicles and small construction machinery. Installed on the rear fuel pipeline before high-pressure fuel pumps and precision common rail injectors, it acts as the core secondary precision filtration component of the fuel supply system. This filter adopts dual-stage filtration structure, which can efficiently intercept large impurities including rust particles, coarse sand and sediment in the outer layer, and trap micro fine silt, carbon sludge and colloidal abrasive particles in the inner layer, effectively preventing scratch wear, clogging and premature damage of precision fuel injection components. Manufactured strictly in accordance with IATF 16949 automotive quality standards and ISO 19438 filtration testing standards, it maintains stable 3μm high-precision filtration performance during long-distance highway logistics transportation, dusty mountain construction roads, high-temperature tropical regions and frigid low-temperature northern working environments. As a perfect OEM direct cross replacement filter for original Mann WDK999/1, SC880102 and P550004, it stabilizes continuous engine power output, reduces unexpected vehicle downtime, and significantly extends the service life of expensive fuel injectors and high-pressure oil pumps for heavy truck fleets.  Product Material Description: High-Strength Thickened Carbon Steel Outer Housing: Standard dimension: OD 93mm, total height 143mm, thread specification M18×1.5 internal threadMANN-FILTER. Made of thick cold-rolled high tensile carbon steel with full electrophoretic anti-rust and anti-corrosion coating. It features outstanding pressure resistance and impact resistance, capable of enduring long-term rated fuel system working pressure without expansion, cracking or diesel leakage, providing comprehensive stable outer protection for internal filter media. Two-Layer Gradient Composite Filter Media: Outer synthetic pre-filter layer + inner imported resin-impregnated wood pulp filter paper, processed with deep dense pleated folding design to maximize effective filtration area. The progressive gradient density structure realizes staged step-by-step filtration, balances excellent contaminant capture efficiency and ultra-low flow resistance, ensuring sufficient smooth fuel supply even under full engine rated load. Industrial Grade NBR Nitrile Rubber Sealing Gasket: Premium oil-resistant high-temperature nitrile rubber seal ring, resistant to long-term diesel soaking, thermal aging and drastic temperature fluctuations. It retains stable sealing elasticity within working temperature range of -35℃ ~ 125℃, completely preventing bypass of unfiltered raw fuel and oil leakage at the mounting joint. Precision CNC Machined Thread Base: Solid carbon steel threaded base with accurate M18×1.5 thread tolerance and rigid structural strength, designed for quick spin-on installation and easy disassembly during daily routine maintenance.

S00010128+01 FC-38050 Spin-On OEM Diesel Fuel Filter S00010128+01 is the official OEM Shangchai (SDEC) fuel filter part number, cross referenced with part code FC-38050, a professional spin-on fine diesel fuel filter exclusively designed for full series Shangchai electronic injection diesel engines. Installed on the fuel supply pipeline before high-pressure fuel pumps and precision common rail injectors, it serves as the key purification component to thoroughly filter incoming diesel fuel. This filter efficiently intercepts solid contaminants including rust particles, fine sand, carbon residue, colloidal sludge and tiny abrasive impurities mixed in diesel oil, effectively avoiding scratch damage, clogging and premature failure of precision fuel system parts. Manufactured strictly in accordance with IATF 16949:2016 international automotive quality standards, it delivers stable continuous filtration performance under long-distance heavy truck haulage, dusty construction crane operation, outdoor stationary generator work, high-temperature tropical climates and low-temperature cold environments. It is a perfect direct OEM interchange replacement filter for original Shangchai factory parts, which stabilizes consistent engine power output, reduces unexpected equipment downtime, and greatly extends the service life of core fuel assemblies for heavy commercial vehicles, engineering cranes and industrial generator fleets.  Product Material Description: High-Strength Thickened Carbon Steel Outer Housing: Adopts thick cold-rolled high tensile carbon steel shell with full electrophoretic anti-rust and anti-corrosion coating. Overall dimension: 112×112×218mm, with standard precision internal thread base. It has outstanding pressure resistance, impact resistance and diesel chemical corrosion resistance, which can withstand long-term normal fuel system working pressure without expansion, cracking or fuel leakage, providing comprehensive stable outer protection for internal filter media. Multi-Layer Gradient Resin-Impregnated Filter Media: Premium high-density wood pulp composite filter paper treated with hydrophobic resin, manufactured with deep dense pleating technology to maximize the effective filtration area. The progressive gradient density structure realizes staged precise fine filtration, balances excellent particle capture efficiency and ultra-low flow resistance, ensuring sufficient smooth fuel supply even under full engine rated load. Industrial Grade NBR Nitrile Rubber Sealing Gasket: High temperature and oil resistant nitrile rubber seal ring, resistant to long-term diesel soaking, thermal aging and drastic temperature fluctuations. It retains stable sealing elasticity within the working temperature range of -35℃ ~ 125℃, completely preventing bypass of unfiltered raw fuel and oil leakage at the mounting joint. Precision CNC Machined Thread Base: Solid carbon steel threaded base with accurate thread tolerance and rigid mechanical strength, designed for easy spin-on installation and fast disassembly during routine daily maintenance.

P1110210700A0 Spin-On Diesel Fuel Filter P1110210700A0 is an OEM standard spin-on diesel fuel filter specially developed for Foton Tunland series diesel pickup trucks equipped with Cummins ISF 2.8 Euro VI common rail engines. Installed on the front fuel delivery pipeline, it acts as the primary purification barrier to protect high-pressure fuel pumps and precision fuel injectors. This filter efficiently traps solid contaminants including rust particles, fine sand, carbon deposits, colloidal sludge and tiny abrasive impurities mixed in diesel fuel, while realizing preliminary water separation to remove free moisture effectively. Manufactured strictly in compliance with IATF 16949 automotive quality system standards, it maintains stable high filtration efficiency during daily urban delivery, long-distance highway driving, dusty rural roads, high-temperature summer areas and low-temperature cold northern environments. It is a perfect direct aftermarket replacement OEM part, which can effectively reduce injector clogging and fuel pump wear risks, stabilize engine power output, and extend the service life of core fuel system assemblies for daily pickup operation.  Product Material Description: High-Strength Cold-Rolled Steel Outer Housing: Overall dimension Φ94×148mm, made of thickened cold-rolled carbon steel with full electrophoretic anti-rust and anti-corrosion coating. It features excellent pressure resistance and impact resistance, can withstand normal fuel system working pressure without expansion, cracking or diesel leakage, providing comprehensive external protection for internal filter media. Multi-Layer Gradient Resin-Impregnated Filter Paper: High-density composite wood pulp filter paper treated with hydrophobic resin, adopting deep dense pleated folding design to maximize effective filtration area. The progressive gradient density structure realizes staged fine filtration, balances outstanding particle interception efficiency and ultra-low flow resistance to ensure stable fuel supply under full engine load. Industrial Grade NBR Nitrile Rubber Sealing Gasket: Premium oil-resistant nitrile rubber seal ring, resistant to long-term diesel erosion, high temperature and aging. It keeps stable sealing elasticity within the working temperature range of -35℃ ~ 125℃, completely preventing unfiltered fuel bypass and installation joint oil leakage. Precision CNC Thread Base: Standard M18×1.5 internal thread processed by CNC machining, with precise thread tolerance and firm structural strength, convenient for spin-on installation and quick disassembly during routine maintenance.

ME056670 BF7993 Spin-On Diesel Fuel Filter ME056670 is the original Mitsubishi OEM part number, fully interchangeable with Baldwin BF7993, a classic heavy-duty spin-on diesel fuel filter engineered for Mitsubishi Fuso heavy commercial trucks and Mitsubishi-powered construction excavators. With a stable 3μm nominal filtration rating, it acts as the core primary purification component installed on the front-end fuel supply line, effectively removing solid contaminants including rust particles, fine sand, carbon deposits, colloidal sludge and abrasive grit from diesel fuel before fluid enters high-pressure fuel pumps and precision fuel injectors. Manufactured strictly to IATF 16949 automotive quality standards, this filter delivers consistent reliable performance under long-distance highway haulage, dusty mining construction sites, high-temperature tropical climates and frigid low-temperature working conditions. It serves as a perfect aftermarket cross replacement for original ME056670, Baldwin BF7993, Fleetguard FF5367 and Donaldson P550391 filters, fully protecting vulnerable fuel system components, lowering premature wear and clogging failures, and ensuring stable continuous power output for medium & heavy trucks and engineering machinery fleets worldwide.  Product Material Description: High-Strength Cold-Rolled Steel Outer Housing: Thick stamped carbon steel shell coated with full electrophoretic anti-rust and anti-corrosion paint. Standard dimension: OD 93.7mm, Height 166.7mm, thread specification M24×1.5 internal thread. It features excellent pressure resistance and impact resistance, withstands standard fuel system operating pressure without expansion, cracking or diesel leakage, providing complete physical protection for internal filter media. Multi-Layer Gradient Resin-Impregnated Filter Paper: Premium cellulose composite filter media processed with deep dense pleating to maximize the effective filtration area. The progressive gradient density structure realizes staged precise filtration, balances outstanding particle trapping efficiency and low flow resistance, maintaining steady fuel flow even under full engine rated load. Industrial NBR Nitrile Rubber Sealing Gasket: Integrated high-temperature oil-resistant nitrile rubber seal ring, resistant to long-term diesel erosion, thermal aging and drastic temperature fluctuation. It retains stable sealing elasticity within the working temperature range of -35℃ ~ 125℃, thoroughly preventing unfiltered fuel bypass and mounting joint oil leakage. Precision CNC Machined Thread Base: Solid carbon steel threaded base with accurate M24×1.5 thread tolerance and rigid structural strength, designed for quick spin-on installation and easy disassembly during routine maintenance.

L6500-1105140 P502466 Spin-On 2 Micron Diesel Fuel Filter L6500-1105140 is the official OEM part number for Yuchai & Sinotruk heavy-duty engines, fully interchangeable with Donaldson standard part P502466, a premium spin-on secondary diesel fuel filter with professional 2μm ultra-precision filtration performance. Designed for mainstream Weichai, Yuchai, Sinotruk MC series heavy-duty truck engines and Kobelco SK series excavator diesel power systems, it acts as the core precision protection component of the fuel supply pipeline before high-pressure fuel pumps and common rail injectors. This filter efficiently captures micro solid contaminants including rust grit, fine sand, carbon sludge, colloidal deposits and tiny abrasive particles inside diesel fuel, effectively preventing injector scoring, clogging and fuel pump premature damage. Manufactured strictly following IATF 16949 international automotive quality certification standards, it passes ISO 4548-12 professional filtration testing, delivering stable consistent performance during long-distance highway haulage, dusty mining construction sites, high-temperature tropical areas and frigid low-temperature northern operating environments. As a perfect cross aftermarket replacement for original L6500-1105140 and Donaldson P502466 filters, it stabilizes continuous engine power output, cuts unexpected vehicle downtime, and significantly extends the service life of expensive precision fuel system assemblies for heavy commercial fleets and engineering machinery.  Product Material Description: Heavy-Duty Thickened Carbon Steel Housing: Adopts thick cold-rolled high tensile carbon steel shell with full electrophoretic anti-rust and anti-corrosion coating. Overall dimension: OD 108mm, Height 210mm, standard thread specification 1"-14UNF-2B. It withstands maximum working pressure up to 6.9bar, featuring excellent pressure resistance and impact resistance, no expansion, cracking or diesel leakage under long-term operation, offering full physical protection for internal filter media. High-Density Gradient Cellulose Filter Media: Premium resin-impregnated multi-layer cellulose filter paper with deep dense pleated folding design to maximize effective filtration area. Progressive gradient density structure realizes staged fine filtration, achieving stable 2μm particle capture efficiency, balancing outstanding contaminant holding capacity and ultra-low flow resistance to guarantee smooth fuel supply under full engine rated load. Industrial Grade NBR Nitrile Rubber Seal Ring: High temperature & oil resistant nitrile rubber gasket, resistant to long-term diesel erosion, thermal aging and drastic temperature fluctuation. It maintains stable sealing elasticity within working temperature range of -35℃ ~ 130℃, completely preventing unfiltered fuel bypass and mounting joint oil leakage. Precision CNC Machined Thread Base: Solid carbon steel threaded base with accurate thread tolerance and rigid structural strength, supporting fast spin-on installation and convenient disassembly during routine maintenance.

F0125-004 Spin-On Diesel Fuel Filter OEM K6200-1105140KS1 F0125-004 is a professional spin-on secondary diesel fuel filter, fully cross-referenced with OEM part number K6200-1105140KS1 and interchangeable with MF30485, specially customized for Yuchai 6K series Euro VI common rail heavy-duty diesel engines widely equipped on JAC heavy trucks, bulk cargo vehicles, tractor units and medium construction machinery. Installed on the rear fuel pipeline before high-pressure fuel pumps and precision fuel injectors, it serves as the final precision protection barrier for the engine fuel system. This filter efficiently captures rust particles, fine sand, carbon residue, colloidal sludge and tiny abrasive impurities mixed in diesel fuel, effectively preventing micro-scratches, injector clogging and premature fuel pump damage. Manufactured strictly under IATF 16949 automotive quality management standards, it delivers stable long-cycle filtration performance during long-distance highway haulage, dusty mining routes, high-temperature tropical climates and frigid low-temperature northern working environments. As a perfect aftermarket OEM direct replacement filter, it stabilizes sustained engine power output, reduces unexpected vehicle downtime, and greatly extends the service life of expensive precision fuel system assemblies for heavy-duty fleets.  Product Material Description: High-Strength Thickened Carbon Steel Housing: Made of thick cold-rolled high tensile carbon steel with full electrophoretic anti-rust and anti-corrosion coating. Standard dimension Φ110×243mm, thread specification M32×1.5-6H. It features outstanding pressure resistance and impact resistance, capable of enduring long-term rated fuel system working pressure without expansion, cracking or diesel leakage, providing comprehensive stable outer protection for internal filter media. Multi-Layer Gradient Composite Filter Media: High-density resin-impregnated wood pulp filter paper with deep dense pleated folding design to maximize effective filtration area. The progressive gradient density structure realizes staged precise fine filtration, balances excellent particle trapping efficiency and ultra-low flow resistance, ensuring sufficient steady fuel supply even under full engine rated load. Industrial Grade NBR Nitrile Rubber Seal: Premium oil-proof high-temperature nitrile rubber sealing gasket, resistant to long-term diesel soaking, thermal aging and drastic temperature fluctuations. It maintains stable sealing elasticity within -35℃ ~ 130℃ working temperature range, completely preventing bypass of unfiltered raw fuel and oil leakage at the mounting joint. Precision CNC Thread Base: Solid carbon steel threaded base with standard M32×1.5 internal thread processed by CNC machining, accurate thread tolerance and rigid structural strength for convenient spin-on installation and quick disassembly during daily routine maintenance.