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 6650-00-597-7313
NSN 5925-00-473-0481
NSN 6620-01-157-9267
NSN 5998-01-399-4324
NSN 5895-01-593-1123
NSN 5985-01-056-5179
NSN 5990-01-400-3299
NSN 6135-00-271-0407
NSN 5945-01-486-3989
NSN 5985-00-212-7690
NSN 5930-01-066-6499
NSN 6320-01-320-3305