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 5920-01-645-8052
NSN 5910-01-299-1316
NSN 5855-00-149-0766
NSN 5945-01-108-4672
NSN 5975-01-317-4625
NSN 5925-01-318-3031
NSN 5965-00-208-4896
NSN 6130-01-604-0774
NSN 5990-01-388-0252
NSN 6240-01-481-7396
NSN 5910-01-363-6278
NSN 5855-01-463-7372