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 5925-01-059-0275
NSN 5960-00-078-5407
NSN 2925-00-215-4954
NSN 5960-00-979-7303
NSN 6135-00-961-3603
NSN 5855-01-378-1888
NSN 6610-00-070-1842
NSN 6685-01-067-1447
NSN 5945-01-520-5643
NSN 5835-01-189-6095
NSN 5999-00-288-5954
NSN 5945-00-619-3553