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 6645-00-542-1206
NSN 6620-01-201-4176
NSN 5985-01-518-5881
NSN 4140-00-006-4188
NSN 5975-01-605-1246
NSN 6150-01-373-4465
NSN 5915-00-442-5168
NSN 5915-00-024-0384
NSN 5945-01-389-4073
NSN 5960-01-641-5493
NSN 5960-01-487-6436
NSN 6645-01-578-7959