A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5910-01-177-2280
NSN 6685-00-914-9771
NSN 6135-00-334-4500
NSN 6105-01-583-2048
NSN 7035-01-113-1424
NSN 5945-01-491-8981
NSN 6650-00-736-8456
NSN 6150-00-343-7404
NSN 5945-01-485-3447
NSN 2925-00-583-9669
NSN 5996-00-766-0814
NSN 5920-01-401-5315