A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-00-557-0772
NSN 5935-01-209-6850
NSN 5950-01-544-4723
NSN 6110-00-724-3136
NSN 5996-01-014-5852
NSN 6150-00-569-4755
NSN 6135-00-087-5300
NSN 6645-01-358-1474
NSN 6105-01-598-9077
NSN 6645-00-256-4072
NSN 5950-00-540-5688
NSN 5910-01-433-5721