A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5999-01-138-7437
NSN 5990-01-328-8225
NSN 5965-00-858-5398
NSN 6220-01-445-4002
NSN 6150-01-136-9309
NSN 7035-00-251-8201
NSN 5935-00-802-3662
NSN 5985-00-337-6819
NSN 5975-00-185-5243
NSN 4140-01-190-1023
NSN 5960-00-034-5144
NSN 5910-01-558-6794