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 6685-01-597-0551
NSN 5915-01-370-5367
NSN 5965-00-647-3972
NSN 5965-01-075-3148
NSN 6130-00-477-0571
NSN 7035-01-564-1821
NSN 5910-00-554-1422
NSN 5925-01-553-0465
NSN 5915-00-203-5890
NSN 6220-00-542-4898
NSN 2925-01-514-3865
NSN 5975-01-632-4976