A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-215-0470
NSN 5996-00-153-3216
NSN 2925-00-964-7128
NSN 6110-00-829-8060
NSN 5910-01-070-7434
NSN 5895-00-030-4380
NSN 6145-00-225-8709
NSN 5925-01-242-9945
NSN 6220-01-271-5007
NSN 6240-01-328-8999
NSN 5925-01-497-7944
NSN 2925-01-327-3069