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 5998-01-425-7840
NSN 5910-00-584-4614
NSN 6150-01-283-5369
NSN 6620-01-632-0394
NSN 6150-00-288-6245
NSN 5960-01-573-6483
NSN 6645-01-129-8211
NSN 5998-01-591-5920
NSN 5950-01-376-5086
NSN 6685-01-460-0586
NSN 5935-01-280-9804
NSN 5998-01-385-9476