A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5915-01-429-3738
NSN 5996-00-811-4168
NSN 2925-01-091-4734
NSN 5999-00-272-7453
NSN 5985-01-107-5078
NSN 5999-01-410-2867
NSN 6110-01-410-7637
NSN 6220-01-494-0572
NSN 6320-01-506-9439
NSN 5945-01-154-0124
NSN 6610-01-660-9082
NSN 2925-01-595-4345