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 5905-01-577-9854
NSN 5950-01-123-9384
NSN 5999-00-862-3437
NSN 5990-01-357-6175
NSN 5950-01-199-5342
NSN 5960-01-318-0987
NSN 5960-01-046-4884
NSN 5960-00-239-3054
NSN 6135-01-142-6456
NSN 6110-00-008-1766
NSN 7035-01-528-2654
NSN 6135-00-500-2082