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 6650-00-885-3775
NSN 5905-00-862-2900
NSN 6320-01-280-5091
NSN 5975-01-584-7459
NSN 6240-00-695-1032
NSN 5960-01-442-0908
NSN 5925-01-394-3725
NSN 5990-01-176-9731
NSN 5935-01-083-2459
NSN 2925-01-300-2897
NSN 6145-01-304-2284
NSN 5996-00-173-9652