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 5965-01-511-5392
NSN 5855-01-521-4836
NSN 6110-01-168-3446
NSN 6620-00-066-1284
NSN 5905-01-139-6776
NSN 5996-00-202-6576
NSN 5999-01-020-7641
NSN 5985-00-551-9519
NSN 5950-00-913-2213
NSN 6610-01-473-1843
NSN 5935-01-179-9498
NSN 6110-01-396-0864