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 6650-01-447-2858
NSN 5975-00-867-4780
NSN 6135-01-413-4747
NSN 6320-00-831-2227
NSN 5965-01-209-2838
NSN 5910-01-273-8780
NSN 5915-00-450-0100
NSN 5965-00-812-9158
NSN 5999-00-584-4577
NSN 5930-00-707-6899
NSN 5950-01-554-9264
NSN 5965-00-067-7393