A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5965-01-386-9281
NSN 6145-01-162-2610
NSN 6685-01-027-5903
NSN 5915-01-095-8306
NSN 5920-01-025-1618
NSN 5985-00-928-0899
NSN 5925-00-660-3892
NSN 6130-00-326-3680
NSN 5998-00-577-3519
NSN 6110-01-412-8549
NSN 6110-01-237-7079
NSN 5996-01-338-0555