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 6620-01-432-7032
NSN 6105-00-527-2193
NSN 6145-01-251-9740
NSN 6685-00-082-1939
NSN 5930-01-387-7956
NSN 6105-01-303-5856
NSN 6645-01-456-1182
NSN 6105-01-505-9946
NSN 5930-01-088-7586
NSN 6220-01-066-5529
NSN 6685-00-303-3283
NSN 5998-01-262-6254