A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5915-00-359-7776
NSN 6110-01-592-2427
NSN 5835-00-647-2104
NSN 5925-00-955-0659
NSN 6320-01-513-9166
NSN 5950-01-144-8597
NSN 6620-01-210-5583
NSN 5950-00-174-3655
NSN 6145-01-634-0388
NSN 6150-01-240-0981
NSN 5975-01-392-4175
NSN 6685-01-325-7021