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 5950-01-250-1333
NSN 5835-01-581-1957
NSN 5925-00-914-2987
NSN 5925-00-493-9154
NSN 6145-01-364-0346
NSN 6220-01-204-8916
NSN 2925-00-928-5931
NSN 6130-00-249-7891
NSN 5925-01-369-8931
NSN 7035-01-423-8343
NSN 5915-01-096-2923
NSN 5895-01-600-0401