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 6150-01-115-8426
NSN 6110-01-100-7638
NSN 6150-01-546-1881
NSN 6220-01-234-7809
NSN 6135-00-643-4843
NSN 6105-01-435-3431
NSN 5855-01-295-2313
NSN 5905-01-534-7894
NSN 6145-01-432-2440
NSN 5999-01-258-5400
NSN 6650-00-563-3880
NSN 6135-01-190-2628