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 5855-00-973-5717
NSN 6135-00-334-4500
NSN 5935-01-485-2457
NSN 5935-00-013-7404
NSN 6320-00-036-3688
NSN 5996-00-141-3945
NSN 6685-00-580-5958
NSN 5950-01-088-6622
NSN 5975-01-327-1303
NSN 6240-00-787-8329
NSN 6685-01-380-0469
NSN 6645-00-601-6793