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 6685-01-450-1949
NSN 5999-00-888-9599
NSN 5935-01-184-5160
NSN 5910-01-082-6836
NSN 5960-01-273-7044
NSN 6150-01-180-6346
NSN 6150-01-464-0364
NSN 6105-00-939-8619
NSN 5930-01-415-3656
NSN 5985-01-381-9203
NSN 7035-00-731-8729
NSN 5925-01-127-3794