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 6650-01-604-9315
NSN 5975-01-109-0511
NSN 5915-01-418-3639
NSN 5855-01-634-0259
NSN 5910-01-100-3282
NSN 6620-01-020-2628
NSN 5960-00-389-2915
NSN 5925-01-520-7059
NSN 6145-00-278-0697
NSN 5855-01-136-1916
NSN 6610-01-528-5750
NSN 6145-01-028-4494