A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-01-292-5613
NSN 6130-00-369-6637
NSN 5950-00-245-9659
NSN 6105-00-159-1061
NSN 6620-00-033-3280
NSN 5985-01-188-7090
NSN 7035-01-144-6408
NSN 6650-01-099-6271
NSN 5998-01-459-5763
NSN 5985-00-381-6140
NSN 6650-01-521-5903
NSN 5935-00-303-5916