A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5895-01-622-4818
NSN 5895-00-963-6838
NSN 6130-01-574-0530
NSN 5998-01-142-2687
NSN 6135-00-078-9931
NSN 5895-01-434-9006
NSN 6220-01-546-2064
NSN 5935-01-534-2055
NSN 6320-01-123-6814
NSN 5935-01-146-3618
NSN 2925-01-604-8984
NSN 5935-01-005-2068