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 6645-01-079-1262
NSN 5998-01-213-3164
NSN 6130-00-653-4228
NSN 6105-01-492-7354
NSN 5920-01-592-0161
NSN 6610-01-573-5949
NSN 5935-01-193-1367
NSN 6150-01-388-2898
NSN 5998-01-433-6483
NSN 5895-00-499-4469
NSN 2925-01-629-9416
NSN 5920-00-943-4022