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 5999-01-321-4479
NSN 5950-01-556-7989
NSN 5910-01-524-9838
NSN 6320-01-627-8295
NSN 5950-01-286-8276
NSN 6610-00-314-2605
NSN 6130-01-165-9419
NSN 7035-01-565-1288
NSN 6150-01-144-6991
NSN 5855-01-222-1242
NSN 5998-01-641-1164
NSN 5855-00-560-0110