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 6620-01-602-8402
NSN 4140-00-728-8117
NSN 5915-01-315-0268
NSN 6610-01-032-5335
NSN 6645-01-039-0058
NSN 6240-01-528-5370
NSN 5930-01-310-6879
NSN 6220-01-314-9594
NSN 5965-00-223-6354
NSN 6105-00-161-8070
NSN 5990-01-530-8452
NSN 5950-00-516-2436