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 6645-00-479-9334
NSN 6650-01-173-5651
NSN 5996-01-462-1631
NSN 6320-01-476-7476
NSN 4140-01-652-5868
NSN 5835-00-170-5238
NSN 6620-00-286-5721
NSN 5945-00-466-3748
NSN 5915-01-232-7348
NSN 5985-01-252-8822
NSN 6645-00-119-6221
NSN 5905-01-295-5078