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 7035-00-111-4389
NSN 5965-01-296-8991
NSN 5935-01-270-3568
NSN 6620-01-647-1393
NSN 6150-00-636-8938
NSN 6105-00-642-2056
NSN 5945-01-161-4615
NSN 6685-01-231-7794
NSN 5990-00-284-0537
NSN 5950-00-275-0391
NSN 5905-00-544-9664
NSN 6620-01-420-6831