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 5905-01-386-9493
NSN 6240-00-372-4841
NSN 6320-00-925-0558
NSN 6220-00-012-0027
NSN 5999-01-119-2983
NSN 5945-01-628-7124
NSN 5999-01-215-8073
NSN 6610-01-305-8863
NSN 5975-00-828-9556
NSN 6645-01-511-3272
NSN 5895-01-519-3661
NSN 6240-01-156-6886