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 6650-00-342-6447
NSN 6220-00-542-4898
NSN 5950-01-334-8632
NSN 5945-00-612-1598
NSN 5935-01-069-2213
NSN 5930-00-498-3221
NSN 5935-01-420-5897
NSN 5975-01-144-9401
NSN 5960-01-505-2426
NSN 6130-00-712-8546
NSN 6320-00-139-1090
NSN 5855-01-361-2362