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 5996-01-333-9512
NSN 6240-01-447-8088
NSN 5915-01-350-9909
NSN 5975-01-152-2910
NSN 6650-01-578-8176
NSN 5950-00-194-2749
NSN 5905-00-285-2866
NSN 6320-00-994-0179
NSN 5985-00-827-6827
NSN 5999-01-039-3228
NSN 5990-01-432-0523
NSN 4140-01-298-3696