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 6130-01-196-0607
NSN 5960-01-225-6621
NSN 5905-00-006-3961
NSN 6685-01-410-3456
NSN 5950-00-108-9564
NSN 5925-01-056-1077
NSN 6320-01-426-8947
NSN 6130-00-247-4782
NSN 5910-01-356-6474
NSN 6320-01-359-3921
NSN 6650-00-443-4292
NSN 5835-00-125-7320