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 6240-01-090-9146
NSN 5905-00-891-8665
NSN 5965-00-859-8135
NSN 4140-01-271-8528
NSN 5998-01-542-2291
NSN 6145-00-221-6528
NSN 6645-00-760-5599
NSN 5999-01-649-6139
NSN 6685-00-052-9003
NSN 5996-00-787-3581
NSN 6105-00-494-9703
NSN 6650-00-310-2534