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 6110-01-521-9253
NSN 6150-00-350-5472
NSN 5960-01-276-7836
NSN 6145-00-498-2738
NSN 5930-01-025-4268
NSN 5855-00-327-2112
NSN 5996-01-408-8805
NSN 6645-01-504-3394
NSN 5935-01-419-1737
NSN 6105-00-063-7633
NSN 5915-00-800-2426
NSN 6240-00-502-7710