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 5998-00-227-2118
NSN 5965-01-065-5544
NSN 5965-01-295-4426
NSN 5965-01-326-9860
NSN 6220-00-466-2681
NSN 6110-00-467-7151
NSN 7035-01-010-8309
NSN 5945-00-294-4869
NSN 6685-01-385-7049
NSN 5855-01-430-3246
NSN 6645-01-080-6052
NSN 5905-01-634-0595