A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6110-00-775-9161
NSN 6645-01-631-1866
NSN 6320-01-519-8767
NSN 5996-00-959-4892
NSN 6110-00-804-4830
NSN 5910-01-334-9759
NSN 6620-01-197-5436
NSN 5910-01-546-8370
NSN 6110-00-859-8568
NSN 6150-00-473-5344
NSN 6110-00-028-2064
NSN 5855-01-354-7291