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 6135-01-127-0173
NSN 6130-00-822-0777
NSN 6610-00-225-9886
NSN 5895-01-443-4733
NSN 5925-00-205-2767
NSN 5998-01-351-5597
NSN 6620-01-047-5831
NSN 5998-00-553-9535
NSN 6645-01-444-3016
NSN 6240-01-415-5581
NSN 5895-00-521-2325
NSN 5920-01-645-8052