A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-01-634-0678
NSN 7035-00-135-4758
NSN 6150-01-176-0221
NSN 7035-00-059-7970
NSN 6620-01-026-0346
NSN 6610-01-023-1812
NSN 2925-01-069-5324
NSN 5985-01-619-2998
NSN 6685-01-306-4747
NSN 5895-01-069-2173
NSN 5895-01-232-1164
NSN 6150-01-284-1922