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 5935-00-389-7160
NSN 6150-01-437-8375
NSN 6645-00-369-4410
NSN 5905-01-627-9681
NSN 6135-00-767-0331
NSN 6130-01-155-8926
NSN 6620-01-082-7326
NSN 6685-01-359-3944
NSN 5835-01-593-7579
NSN 6150-00-220-9382
NSN 6105-00-316-5098
NSN 6130-01-044-4162