A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6650-01-050-5974
NSN 2925-00-428-6349
NSN 5998-01-530-6109
NSN 5965-00-275-0491
NSN 6145-01-092-0310
NSN 6685-01-336-6645
NSN 6145-01-453-7015
NSN 6220-01-371-6768
NSN 2925-01-459-8093
NSN 5915-00-141-0410
NSN 5999-01-079-5503
NSN 6150-01-476-8267