A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 6620-00-075-0131
NSN 6135-00-998-5884
NSN 6110-01-273-9759
NSN 5910-01-368-3865
NSN 5960-01-093-5787
NSN 6240-00-353-5753
NSN 5950-01-275-1589
NSN 5960-00-452-6043
NSN 6240-00-829-4179
NSN 4140-00-608-5654
NSN 6610-01-010-0276
NSN 5905-00-370-1854