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 5855-00-004-0904
NSN 5925-01-590-2513
NSN 5915-01-598-9816
NSN 5925-01-319-1648
NSN 5905-01-144-0434
NSN 6320-01-162-5977
NSN 6150-01-272-9154
NSN 5910-00-584-6484
NSN 6135-00-938-1351
NSN 2925-01-068-3844
NSN 6320-01-319-3584
NSN 5905-00-120-9274