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 6620-00-235-4938
NSN 6145-00-360-7760
NSN 5855-01-098-9038
NSN 5910-01-268-7709
NSN 6645-01-099-6887
NSN 6240-01-098-6410
NSN 5998-01-580-7691
NSN 6220-01-413-3030
NSN 5935-00-233-5430
NSN 5990-00-752-2126
NSN 5960-01-547-6699
NSN 5985-01-529-6488