A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-01-257-2110
NSN 5945-00-931-0811
NSN 5985-00-264-7480
NSN 5945-01-415-0858
NSN 5895-00-143-7215
NSN 5965-00-836-2690
NSN 5855-00-427-7848
NSN 7035-01-322-8180
NSN 6135-01-101-5039
NSN 5960-01-495-0859
NSN 6645-01-442-6476
NSN 5996-00-864-5158