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 5996-00-196-7258
NSN 6320-01-294-7161
NSN 5998-01-119-9648
NSN 2925-01-112-8782
NSN 6110-01-593-8570
NSN 6135-01-430-3119
NSN 5915-01-573-5980
NSN 5945-01-197-0340
NSN 5996-01-440-9660
NSN 5925-01-357-5560
NSN 6220-00-923-9439
NSN 5905-01-535-5767