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 5920-01-386-5798
NSN 7035-00-553-6951
NSN 5935-00-455-1766
NSN 5998-00-684-8186
NSN 6220-01-427-2333
NSN 6220-01-222-0724
NSN 2925-01-206-7948
NSN 5960-00-597-2680
NSN 5965-00-062-0559
NSN 5950-01-219-9667
NSN 5895-00-850-2368
NSN 6105-01-620-1638