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 6620-01-027-6658
NSN 5915-01-656-1685
NSN 6135-01-608-9403
NSN 6110-00-913-2574
NSN 6145-01-432-2440
NSN 6145-00-542-7980
NSN 7035-00-092-4356
NSN 5835-01-388-5198
NSN 6105-01-056-5258
NSN 5925-01-435-9492
NSN 6620-01-281-3542
NSN 5965-01-462-2291