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 5975-01-513-7509
NSN 6645-01-099-6887
NSN 6650-00-266-6808
NSN 5930-01-218-6533
NSN 6650-01-371-2356
NSN 5930-01-158-3133
NSN 2925-01-568-3705
NSN 6240-01-188-1413
NSN 6610-00-186-9180
NSN 5965-01-398-9579
NSN 6135-00-145-8884
NSN 5855-01-207-8691