A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6150-00-469-7017
NSN 5895-01-526-2599
NSN 5999-01-167-8609
NSN 5999-01-343-5472
NSN 5925-00-957-9894
NSN 2925-01-076-6128
NSN 6110-00-718-2264
NSN 5895-01-456-7641
NSN 6620-01-361-6460
NSN 5835-01-459-8664
NSN 5915-01-207-0013
NSN 7035-01-167-2241