A-3900919-AI Bolt; Connecting RodOne New Aftermarket Replacement Connecting Rod Bolt for Cummins B Series Diesel Engines This connecting rod bolt (rod cap screw) is a critical engine fastener used to secure the connecting rod caps to the crankshaft journals in Cummins B Series diesel engines. Replaces Cummins OEM part number 3900919. These are torque to yield fasteners designed for one time use do not reuse removed rod bolts. A complete inline six engine requires 12 bolts (2 per
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