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 5895-01-106-4161
NSN 6610-01-089-2487
NSN 5950-01-262-3577
NSN 6650-01-096-1813
NSN 6130-01-100-6766
NSN 6320-01-600-5808
NSN 5905-01-495-3705
NSN 6150-00-316-3223
NSN 5895-01-308-3305
NSN 6645-00-974-7120
NSN 6610-01-633-8931
NSN 6610-01-583-3255