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 6620-01-412-7426
NSN 5855-00-885-8452
NSN 5905-01-315-6260
NSN 6130-01-452-9774
NSN 5835-01-470-3337
NSN 4140-01-577-8682
NSN 5835-01-572-1284
NSN 6110-01-229-9880
NSN 6105-00-383-7231
NSN 5915-00-795-2811
NSN 5925-01-167-3316
NSN 6240-01-142-8923