A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-01-246-5112
NSN 6130-01-054-3234
NSN 6150-01-046-0247
NSN 6145-00-920-4700
NSN 7035-01-146-7096
NSN 6145-00-570-0516
NSN 5930-01-551-0901
NSN 5915-00-150-4694
NSN 5965-00-226-7870
NSN 5910-00-801-6893
NSN 6620-01-381-5482
NSN 5925-00-689-8068