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 6150-01-571-9076
NSN 6620-01-578-7561
NSN 6105-01-565-7584
NSN 6620-00-225-4870
NSN 7035-00-562-9881
NSN 5990-01-525-2250
NSN 6135-01-485-3082
NSN 2925-01-486-7277
NSN 6645-01-261-6903
NSN 5910-01-205-7474
NSN 5998-01-381-0881
NSN 5895-01-336-6171