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 6220-01-273-7424
NSN 5895-01-470-0209
NSN 5990-00-081-1266
NSN 6135-01-434-4954
NSN 4140-01-162-6912
NSN 5990-00-740-0249
NSN 7035-01-350-4247
NSN 6110-01-381-1269
NSN 5950-00-723-5693
NSN 6150-01-359-8598
NSN 2925-00-749-8893
NSN 6220-00-248-5511