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 6135-01-437-7741
NSN 6150-00-625-6769
NSN 5999-00-348-9213
NSN 5945-01-467-9886
NSN 6135-01-412-0097
NSN 5855-00-179-8588
NSN 5915-01-255-8278
NSN 6620-00-834-9430
NSN 5990-00-518-0684
NSN 5925-00-993-2994
NSN 6620-00-273-8735
NSN 6320-01-354-6204