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 6220-00-470-6828
NSN 5985-01-467-3453
NSN 6650-01-160-9160
NSN 6320-00-194-4252
NSN 6610-01-629-4140
NSN 6645-01-159-5173
NSN 5985-01-003-7399
NSN 6130-00-983-5539
NSN 5998-01-391-5000
NSN 6135-00-152-8729
NSN 6150-01-251-1763
NSN 5905-00-877-3301