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 5895-01-025-0971
NSN 6150-01-516-7898
NSN 5855-00-058-1293
NSN 6620-00-033-3280
NSN 6105-01-370-4267
NSN 6620-01-628-2620
NSN 6135-01-457-2855
NSN 5999-01-234-3523
NSN 2925-01-163-6716
NSN 6645-01-500-0827
NSN 5915-00-453-6724
NSN 5960-01-544-1273