A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-003-9058
NSN 5915-01-367-2056
NSN 6610-01-534-7683
NSN 6220-00-179-6035
NSN 5960-01-185-4216
NSN 5985-00-005-7177
NSN 5990-01-516-6791
NSN 6220-01-239-3423
NSN 5985-00-954-7196
NSN 6240-00-160-9223
NSN 6110-01-113-7642
NSN 5996-01-593-5926