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 5910-00-223-9508
NSN 5945-01-206-9421
NSN 5950-01-399-0248
NSN 5855-00-403-1031
NSN 5905-01-241-7707
NSN 6620-01-313-8164
NSN 5895-01-517-9778
NSN 5910-01-204-9539
NSN 4140-01-064-6474
NSN 5915-00-247-8770
NSN 6145-01-121-1822
NSN 4140-01-498-2792