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 6620-01-379-1235
NSN 6320-00-593-0379
NSN 6620-00-804-8272
NSN 6145-01-440-9983
NSN 6145-01-182-3448
NSN 2925-00-872-4474
NSN 6620-00-119-2803
NSN 5855-01-116-8905
NSN 5960-00-707-3335
NSN 6145-01-632-7994
NSN 5950-00-557-5070
NSN 5985-00-445-6953