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 5998-00-216-3290
NSN 5930-01-387-6980
NSN 5990-01-559-0578
NSN 5998-01-023-2779
NSN 6145-00-643-0463
NSN 5920-01-134-5445
NSN 6320-01-098-2503
NSN 6135-01-487-0773
NSN 5935-00-800-7701
NSN 6650-00-629-8027
NSN 5998-00-950-4966
NSN 5950-01-534-6924