5/16 x 1 1/2 Square bolt for use on Rolls Royce Phantom II motor mounts and other applications. Bolt has hole for cotter pin.
Rolls Royce part number F.71020.
16 required for use with motor mount application.
Material: 12L14 Steel
Finish: Manganese phosphate
Thread: 22 x .700
Length under head: 1.565
Head width: .500
Head thickness” .185