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 6320-00-681-1324
NSN 5998-01-029-5442
NSN 6220-01-545-1397
NSN 5950-00-385-8906
NSN 5985-01-269-1260
NSN 2925-00-290-7052
NSN 5915-00-099-0347
NSN 6610-01-224-7247
NSN 5905-00-193-9598
NSN 6645-01-399-0661
NSN 6220-00-061-4140
NSN 6110-01-344-6885