A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6145-01-650-7272
NSN 5855-01-621-9483
NSN 6320-01-600-5808
NSN 5996-00-168-4786
NSN 5975-00-001-9329
NSN 6110-01-168-8600
NSN 7035-00-406-0568
NSN 6130-00-647-8471
NSN 6240-01-436-9868
NSN 6220-01-313-6390
NSN 6645-01-609-0332
NSN 5855-00-757-5149