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 6610-01-286-3079
NSN 5998-01-527-1433
NSN 5998-00-601-6406
NSN 5855-01-175-2465
NSN 5999-00-262-6041
NSN 6150-00-127-5179
NSN 6145-01-625-1814
NSN 5996-01-253-3486
NSN 5915-01-487-6454
NSN 4140-01-442-8120
NSN 5855-01-279-9938
NSN 6685-01-069-4336