A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-00-975-5176
NSN 5990-01-616-5242
NSN 5996-01-652-4042
NSN 4140-01-159-5135
NSN 5996-00-811-4168
NSN 5965-01-408-6218
NSN 6110-00-669-6726
NSN 7035-00-252-7467
NSN 5950-00-900-8059
NSN 6130-00-528-7838
NSN 5920-01-426-2994
NSN 5990-01-478-8638