A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-01-527-1086
NSN 2925-00-070-3542
NSN 5975-01-364-0969
NSN 4140-01-246-5358
NSN 6645-01-247-2201
NSN 6130-01-577-1232
NSN 6685-00-875-9422
NSN 6130-00-317-3054
NSN 6320-01-600-5808
NSN 5999-01-223-4675
NSN 5835-00-138-7807
NSN 5945-01-167-8045