A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-653-6851
NSN 6610-01-224-7247
NSN 5905-01-011-8936
NSN 5985-00-246-3875
NSN 5835-01-254-8584
NSN 6610-00-551-3610
NSN 5915-01-204-7322
NSN 5990-01-531-5962
NSN 5975-00-553-7151
NSN 5985-01-094-6517
NSN 6610-01-222-7593
NSN 6610-01-511-0982