A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5925-00-999-9320
NSN 6105-01-215-1174
NSN 5920-01-218-6191
NSN 5998-00-948-5298
NSN 5990-00-419-0236
NSN 5930-00-114-5351
NSN 5998-00-731-7155
NSN 5996-00-104-8293
NSN 6130-01-237-4031
NSN 5960-00-918-2369
NSN 5999-01-418-0941
NSN 5915-00-301-3818