A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6220-00-877-6376
NSN 5855-01-051-4143
NSN 5975-01-422-3800
NSN 6105-01-251-1492
NSN 5950-01-549-8111
NSN 6610-00-465-4983
NSN 6105-01-418-6951
NSN 5920-01-411-1831
NSN 5935-00-591-3521
NSN 5935-00-446-4441
NSN 5920-00-499-8285
NSN 5945-01-129-5680