A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5925-01-388-7049
NSN 7035-01-042-5308
NSN 6620-01-066-7950
NSN 5985-01-590-3431
NSN 5945-01-532-9896
NSN 5990-00-928-5655
NSN 6130-00-996-8029
NSN 6620-01-506-1003
NSN 5999-01-285-4319
NSN 5999-01-262-4816
NSN 5915-01-642-8040
NSN 5910-00-633-0736