A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-436-5142
NSN 6105-01-027-0099
NSN 5960-01-211-2089
NSN 5985-01-089-7225
NSN 6220-00-140-7804
NSN 5835-01-368-4015
NSN 5945-01-582-4237
NSN 2925-00-021-9580
NSN 5945-00-932-5219
NSN 5895-01-501-6840
NSN 2925-01-187-5480
NSN 6240-00-957-5724