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 6610-00-796-3087
NSN 6650-00-404-4400
NSN 6240-01-463-3132
NSN 6110-01-094-3180
NSN 5835-01-485-0210
NSN 6610-01-027-1641
NSN 6220-00-171-3702
NSN 6240-01-250-3574
NSN 5965-00-910-3233
NSN 6645-01-556-5263
NSN 5990-01-054-3332
NSN 6610-01-139-2809