A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6110-01-391-8230
NSN 6685-00-329-7010
NSN 6105-00-840-6433
NSN 5930-01-443-0272
NSN 5925-00-468-2757
NSN 6620-00-162-9877
NSN 5999-01-407-7416
NSN 5975-01-038-8707
NSN 6645-01-418-8035
NSN 5935-01-167-9125
NSN 5835-00-787-8122
NSN 6645-01-560-0738