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 5950-01-510-9445
NSN 6145-01-287-7688
NSN 5960-01-516-7264
NSN 6135-01-653-6113
NSN 6220-01-450-9588
NSN 5945-01-101-8843
NSN 5855-01-656-6808
NSN 2925-01-424-9341
NSN 6610-00-841-8221
NSN 6105-01-176-0372
NSN 5915-01-096-8540
NSN 5910-01-363-2065