Mopar Performance Hex Flange Head Main Bearing Cap Bolt

The Mopar Performance Hex Flange Head Main Bearing Cap Bolt is a main cap bolt (also called a main bearing cap screw or crankshaft main cap fastener). It secures the main bearing caps to the engine block, and it is sold for engine rebuilds, service and performance builds. The integrated hex flange head spreads clamping load across the cap's mounting surface, so a separate washer isn't needed.

Key Features:

• Hex flange head design for even clamping force and easy wrench or socket access
• Holds the main bearing caps firmly against the cylinder block to keep the crankshaft supported and aligned
• Made to Mopar engineering standards for strength and thread precision
• Available in multiple lengths and thread configurations for different main cap positions, including inboard, outboard and side cap locations
• Suits stock rebuilds and performance engine builds

Main cap fasteners carry heavy load in any engine. Fresh, correct bolts help restore proper clamp load during a rebuild. Always follow the factory service manual for torque specifications, tightening sequence and whether bolts can be reused.