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 5855-01-433-2220
NSN 5935-01-519-1808
NSN 5985-00-170-9097
NSN 6645-01-643-0297
NSN 5905-01-289-4168
NSN 6150-01-601-0077
NSN 6135-00-838-7008
NSN 6620-00-033-3280
NSN 5965-00-899-0453
NSN 5855-01-064-8961
NSN 7035-01-633-5052
NSN 4140-01-383-1756