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 5950-01-325-3957
NSN 6620-01-360-9680
NSN 5855-00-688-9954
NSN 5905-01-176-3876
NSN 6105-01-223-6299
NSN 5945-00-120-0074
NSN 5925-00-732-7530
NSN 5855-01-555-3354
NSN 6685-01-634-0611
NSN 6135-00-175-7132
NSN 6135-01-291-6712
NSN 6110-01-134-0916