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 5990-01-595-9441
NSN 6650-01-338-9187
NSN 5935-01-255-8974
NSN 6105-00-225-9464
NSN 6320-01-243-2276
NSN 6110-00-108-4610
NSN 6240-01-554-2229
NSN 6320-01-313-8306
NSN 6220-01-252-7506
NSN 5920-01-303-6841
NSN 5855-01-541-5569
NSN 6620-00-212-6921