A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-01-634-0259
NSN 5975-01-083-3243
NSN 6150-00-019-3929
NSN 5998-01-652-6072
NSN 6620-01-535-1230
NSN 7035-01-542-2193
NSN 5945-01-201-8337
NSN 5975-00-278-7437
NSN 5990-00-444-0612
NSN 5975-01-204-1368
NSN 5985-01-152-2693
NSN 5960-01-499-2870