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 6105-01-030-0117
NSN 5945-01-110-0303
NSN 6150-01-631-1951
NSN 5996-01-252-8275
NSN 6650-01-466-5997
NSN 5960-01-032-4229
NSN 5905-00-420-4251
NSN 5895-00-810-0189
NSN 6645-00-248-5434
NSN 6610-01-018-4428
NSN 5975-00-479-4012
NSN 5999-01-442-4750