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 6130-01-320-8376
NSN 6240-01-192-2479
NSN 5950-01-397-6298
NSN 5990-01-480-6711
NSN 6105-01-327-8733
NSN 6685-01-537-4759
NSN 5855-01-634-0259
NSN 4140-01-312-2361
NSN 5895-01-481-3015
NSN 5985-01-503-2001
NSN 6135-01-525-8196
NSN 6240-00-807-8512