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 5960-01-411-5899
NSN 6150-00-970-1226
NSN 6685-01-056-5283
NSN 6620-01-199-7570
NSN 5930-01-273-0152
NSN 5975-01-364-4065
NSN 5945-00-563-6946
NSN 5855-00-688-9954
NSN 5930-01-332-4014
NSN 7035-00-193-2269
NSN 6650-01-523-7026
NSN 6130-00-978-9984