A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-01-219-4203
NSN 6135-01-226-4071
NSN 7035-01-423-8343
NSN 5835-01-155-8301
NSN 6685-00-540-9017
NSN 5999-01-469-1646
NSN 5855-01-587-6166
NSN 5835-00-681-0005
NSN 5935-01-453-9985
NSN 6320-01-246-4390
NSN 5895-01-294-9687
NSN 5935-01-623-3213