A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6645-01-484-9847
NSN 5855-00-548-4742
NSN 5998-01-082-2706
NSN 5925-00-822-0261
NSN 6610-00-516-4228
NSN 4140-00-328-1527
NSN 5835-00-163-3165
NSN 7035-01-633-9537
NSN 6610-01-261-6102
NSN 5965-01-488-6695
NSN 5945-01-224-7610
NSN 5895-01-170-8310