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 6240-00-097-8505
NSN 5990-01-347-6080
NSN 5975-01-537-3765
NSN 5965-01-113-9061
NSN 5930-00-925-8246
NSN 6150-01-451-4049
NSN 5975-00-091-5843
NSN 5855-01-125-4768
NSN 5965-01-655-9656
NSN 5998-01-026-2897
NSN 5835-01-519-2916
NSN 6145-01-625-8725