A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-00-005-5392
NSN 5910-01-087-7555
NSN 5999-01-113-8531
NSN 5990-00-099-0822
NSN 5910-01-482-7504
NSN 5996-00-850-2372
NSN 5905-00-958-5940
NSN 7035-01-532-2184
NSN 6145-01-456-4133
NSN 6135-00-321-6707
NSN 6610-01-434-4958
NSN 5910-01-086-9049