A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-255-2332
NSN 6110-01-344-4533
NSN 6610-01-012-0517
NSN 5905-01-512-0507
NSN 5925-01-415-4809
NSN 5915-01-029-4920
NSN 5920-00-858-1118
NSN 5930-00-010-9402
NSN 5935-01-436-6916
NSN 5999-00-421-6677
NSN 5975-01-113-7397
NSN 5935-01-515-5316