A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5905-01-154-9259
NSN 6110-01-253-5886
NSN 5999-00-595-6786
NSN 6620-01-293-6241
NSN 5985-00-005-7177
NSN 6150-01-208-9209
NSN 5910-00-878-9221
NSN 6135-00-269-5843
NSN 5999-00-318-2675
NSN 6645-01-416-9210
NSN 5960-01-558-7787
NSN 7035-00-205-1932