Profleet Hexagon Flange Head Cap Screw Heavy Duty Trucks, Replaces 3900631

Profleet Hexagon Flange Head Cap Screw Heavy Duty Trucks, Replaces 3900631

• DIMENSIONS AND THREAD SIZE: This heavy-duty engine hex flange head cap screw features an M8 x 1.25 thread pitch and an overall length of 25 mm (0.98"), engineered for precise fitment and tension in tight engine assembly areas.
• HIGH-STRENGTH CONSTRUCTION: Forged from premium-grade alloy steel with a protective finish, this internal engine fastener is designed to withstand high temperatures and continuous mechanical expansion without warping or structural fatigue.
• INDUSTRY CROSS REFERENCES: Designed as a direct professional replacement for 3900631 and Automan equivalents to ensure your commercial vehicle maintains standard factory assembly integrity and fastening security.
• COMPATIBLE VEHICLES: Custom-fit for engine block and exhaust assemblies in various commercial vehicles equipped with Cummns 4B 3.9L, 6B 5.9L, ISB, ISC, and ISL engine platforms for reliable long-haul freight operations.
• TORQUE-RETENTION DESIGN: Features an advanced flanged hexagonal head profile that allows for tighter tool engagement, providing superior clamping force and preventing loosening under harsh road vibrations and high-heat cycles.