A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-01-553-5315
NSN 5910-01-341-9076
NSN 6685-01-395-9156
NSN 5910-01-025-1247
NSN 5975-01-188-7460
NSN 5950-00-497-4571
NSN 6240-01-075-1693
NSN 5998-00-918-6313
NSN 6220-01-056-6507
NSN 7035-00-541-8516
NSN 5925-01-057-0417
NSN 5998-00-278-4481