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 5950-00-643-4023
NSN 6105-00-112-5323
NSN 6320-01-335-8336
NSN 6110-01-463-6431
NSN 6645-01-418-1657
NSN 5975-00-330-9400
NSN 5990-01-564-6173
NSN 5930-01-023-2696
NSN 5895-01-152-4562
NSN 6610-00-264-0961
NSN 5965-00-757-3403
NSN 6145-01-160-7658