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 6685-01-271-6611
NSN 5965-01-314-7333
NSN 5945-00-479-7955
NSN 6320-00-646-3311
NSN 5950-01-359-1003
NSN 5925-00-650-1069
NSN 5855-01-057-2200
NSN 5915-00-276-8332
NSN 5945-01-211-1524
NSN 5965-01-089-8579
NSN 5930-01-354-3784
NSN 6645-01-556-5263