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 6685-00-419-0643
NSN 6220-00-308-6330
NSN 5975-00-372-6265
NSN 6240-00-990-8290
NSN 5920-00-467-9274
NSN 5960-01-541-5734
NSN 6145-01-393-5387
NSN 5975-01-432-0538
NSN 5905-01-408-2590
NSN 6135-00-444-1402
NSN 2925-01-633-4048
NSN 6650-00-751-9958