A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6110-01-423-1416
NSN 6135-00-010-5275
NSN 5835-00-468-3367
NSN 5910-01-521-2872
NSN 6685-01-158-6565
NSN 5910-01-584-0993
NSN 6110-01-261-4980
NSN 5910-00-717-0647
NSN 6135-01-442-4581
NSN 4140-01-285-7854
NSN 5996-01-460-5189
NSN 5965-01-547-9029