A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5835-00-170-5238
NSN 6145-01-012-0804
NSN 6150-01-658-0418
NSN 5985-01-303-5351
NSN 6110-01-347-2647
NSN 5975-00-335-1833
NSN 2925-01-464-3093
NSN 5960-00-586-5292
NSN 5960-00-798-5585
NSN 5925-01-449-1559
NSN 5910-01-236-4063
NSN 6220-01-202-6792