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 5990-01-378-7349
NSN 5855-01-235-5491
NSN 6620-01-423-7300
NSN 5925-01-496-2628
NSN 5855-01-318-7663
NSN 6220-01-454-5132
NSN 6220-01-425-6346
NSN 6135-00-500-2082
NSN 6135-01-604-8739
NSN 6150-01-143-4899
NSN 5998-00-231-2780
NSN 6145-00-563-7716