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 5945-01-428-9943
NSN 6650-01-043-4221
NSN 5998-01-524-0661
NSN 6620-01-272-7831
NSN 7035-01-144-6408
NSN 5996-01-310-2625
NSN 6110-01-172-1383
NSN 5985-01-329-8513
NSN 6135-01-193-8154
NSN 6650-01-378-6868
NSN 5915-01-386-8721
NSN 6320-00-593-0379