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 6220-01-470-6573
NSN 5895-01-119-1601
NSN 6220-01-657-8560
NSN 6135-01-437-7741
NSN 6650-00-924-3340
NSN 6220-01-312-6311
NSN 5915-01-029-6469
NSN 5920-01-151-1442
NSN 6620-01-464-6762
NSN 5930-00-127-2207
NSN 5905-00-767-7594
NSN 6150-00-185-7115