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 6320-01-176-8367
NSN 5925-00-392-6164
NSN 6645-00-720-3953
NSN 5999-01-550-2463
NSN 7035-01-647-9698
NSN 5975-01-327-2316
NSN 6620-01-158-5111
NSN 5996-01-141-7959
NSN 5835-01-096-8570
NSN 5998-01-193-6788
NSN 6610-00-277-7206
NSN 4140-00-492-2468