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 5950-01-169-1462
NSN 6320-01-052-2118
NSN 6650-01-192-9075
NSN 5999-00-553-9352
NSN 4140-01-392-8068
NSN 5990-01-166-2237
NSN 6320-01-029-4220
NSN 5855-01-100-3272
NSN 5985-01-317-3143
NSN 6685-01-046-2803
NSN 6220-00-044-5917
NSN 6685-00-148-8247