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 5950-00-008-8685
NSN 5925-00-969-3090
NSN 5985-01-267-8817
NSN 5960-01-385-9361
NSN 5965-01-205-6249
NSN 6240-01-266-3655
NSN 5915-00-378-5585
NSN 5855-00-455-6070
NSN 5960-01-122-2686
NSN 5855-01-247-0012
NSN 5998-00-804-6136
NSN 6685-01-435-6496