A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-00-537-5573
NSN 5945-00-318-5934
NSN 6610-00-100-1195
NSN 6130-00-187-0211
NSN 5990-01-411-5930
NSN 6240-01-126-9167
NSN 6105-00-205-0655
NSN 5895-00-539-1911
NSN 5925-01-501-8667
NSN 2925-01-068-3844
NSN 5930-01-083-2206
NSN 5950-00-484-3643