A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-00-542-2265
NSN 5935-01-231-8537
NSN 6320-01-449-0043
NSN 2925-01-587-3956
NSN 5920-01-415-9331
NSN 5835-01-221-8811
NSN 6320-01-250-0290
NSN 5925-00-107-4234
NSN 6620-01-534-2370
NSN 5965-01-204-1423
NSN 6645-00-372-2618
NSN 6610-00-925-5064