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 5965-01-005-0341
NSN 6320-00-149-7570
NSN 5985-01-115-8697
NSN 5999-01-609-2670
NSN 6610-01-489-0071
NSN 6135-00-209-6918
NSN 5950-01-074-8774
NSN 5990-01-345-1468
NSN 5915-01-545-1501
NSN 5925-01-623-3864
NSN 5975-01-196-9567
NSN 5990-01-226-6924