Bolt has a round head with serrated shank
A headed externally threaded fastener whose threaded portion is of one nominal diameter with a series of longitudinal ribs, splines or serrations on all or part of the unthreaded portion. See also bolt, ribbed shoulder.
NSN 6645-00-816-1707
NSN 5855-01-575-4439
NSN 6135-01-022-5427
NSN 6135-01-116-3385
NSN 5996-01-444-3915
NSN 6220-01-482-1129
NSN 5985-01-200-7497
NSN 7035-00-763-6180
NSN 5915-01-361-6318
NSN 6645-01-248-8033
NSN 5999-01-435-4607
NSN 6150-00-198-7395