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 6150-01-109-6112
NSN 5996-01-630-2492
NSN 6320-01-249-0598
NSN 6150-01-455-1325
NSN 5990-01-357-2453
NSN 6610-01-461-8180
NSN 5965-01-251-9480
NSN 6145-01-316-9014
NSN 5915-00-679-3093
NSN 6650-01-232-7744
NSN 6650-01-542-0683
NSN 6650-00-486-7924