A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-384-2105
NSN 6240-00-416-6140
NSN 5960-00-552-1940
NSN 5935-01-264-0042
NSN 6105-01-631-2918
NSN 5905-00-426-3434
NSN 5895-01-653-5626
NSN 6685-00-960-0479
NSN 6610-01-464-9729
NSN 2925-01-105-7850
NSN 6620-01-633-8443
NSN 5996-01-284-5205