A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 4140-00-289-9263
NSN 2925-00-845-1480
NSN 5985-01-158-5645
NSN 6105-00-458-2987
NSN 5965-00-221-6546
NSN 2925-01-391-9247
NSN 5915-01-328-2794
NSN 5945-01-634-0588
NSN 6130-00-079-5002
NSN 6145-01-027-9030
NSN 6320-01-347-2638
NSN 5855-00-149-0766