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 6220-01-401-5337
NSN 5855-00-631-4565
NSN 5990-00-879-4301
NSN 6110-01-526-6129
NSN 5998-01-535-3110
NSN 5895-01-193-3199
NSN 6645-00-233-4286
NSN 6320-00-228-5678
NSN 6645-00-498-6869
NSN 6240-01-392-8868
NSN 6685-01-231-2866
NSN 6610-01-361-5784