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 5945-00-200-2311
NSN 6650-01-630-2223
NSN 5930-01-161-9657
NSN 5835-01-015-4610
NSN 6145-01-044-5278
NSN 6645-01-557-4608
NSN 6130-01-439-9497
NSN 6240-00-266-6258
NSN 5855-00-058-1293
NSN 6650-00-410-3582
NSN 5960-01-453-0999
NSN 5975-00-111-1226