A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-00-688-9954
NSN 5965-01-234-6844
NSN 5950-01-515-4363
NSN 5975-00-161-7998
NSN 5999-00-575-7637
NSN 7035-00-104-7613
NSN 5935-01-085-6599
NSN 6135-01-216-9771
NSN 6110-00-663-4054
NSN 5935-01-498-0414
NSN 5996-01-611-8623
NSN 5965-00-825-6734