A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-00-832-9341
NSN 6685-01-349-4450
NSN 6145-00-088-5884
NSN 6145-01-203-4074
NSN 6145-00-520-1714
NSN 5855-01-301-0158
NSN 5915-00-258-0031
NSN 4140-01-227-1342
NSN 6685-00-516-2173
NSN 5990-00-617-1422
NSN 6130-01-252-3922
NSN 5999-01-196-5433