A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6220-00-911-7313
NSN 6130-00-317-3054
NSN 6610-01-552-4956
NSN 5996-00-922-6482
NSN 5985-00-816-8486
NSN 6145-01-132-7780
NSN 6130-00-776-6081
NSN 6105-00-006-7912
NSN 5996-00-943-9050
NSN 5935-01-216-8840
NSN 5990-01-168-6797
NSN 5998-01-570-9125