A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6145-01-003-8665
NSN 6685-01-309-0118
NSN 5985-01-534-0546
NSN 6685-01-327-3286
NSN 5935-01-506-3571
NSN 5985-01-337-8857
NSN 5835-01-511-2072
NSN 6145-01-176-2503
NSN 5960-01-443-3067
NSN 5930-01-144-2506
NSN 5965-00-393-1294
NSN 5998-01-200-0917