A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-01-187-1538
NSN 5950-01-265-6995
NSN 6620-00-505-5031
NSN 5985-01-087-3093
NSN 5935-01-008-0425
NSN 4140-01-234-8568
NSN 6620-01-173-3284
NSN 5996-01-543-7192
NSN 5960-00-982-8546
NSN 6645-01-100-3296
NSN 5996-01-657-5202
NSN 5960-01-481-8051