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 6240-01-554-1926
NSN 5965-01-604-8548
NSN 6150-01-442-9639
NSN 6135-01-322-4655
NSN 5990-01-347-1478
NSN 6685-00-319-8882
NSN 4140-01-323-4279
NSN 5910-00-366-5645
NSN 5990-00-827-0684
NSN 5895-01-100-1825
NSN 6610-00-075-0655
NSN 5935-01-157-9778