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 6145-00-722-9700
NSN 5950-00-833-6096
NSN 6610-01-400-3880
NSN 5996-00-828-7559
NSN 5835-01-214-5402
NSN 5965-01-316-4429
NSN 5998-00-949-8932
NSN 6645-00-527-6531
NSN 5950-01-251-0599
NSN 6220-01-117-7619
NSN 6685-01-363-2765
NSN 5920-01-192-7975