A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5905-01-415-8796
NSN 6110-01-562-4717
NSN 5935-01-085-4560
NSN 5855-01-623-5087
NSN 5965-00-387-6880
NSN 5920-01-398-1626
NSN 5930-00-283-0962
NSN 5835-00-111-2953
NSN 5925-01-584-5331
NSN 6110-01-005-5140
NSN 5835-01-012-7667
NSN 5935-01-455-4932