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 5935-00-158-5541
NSN 5905-00-407-0331
NSN 5925-01-313-3895
NSN 6135-00-798-1425
NSN 4140-01-435-6540
NSN 5990-01-157-0441
NSN 5855-00-560-0110
NSN 6650-01-525-7306
NSN 5855-01-652-4934
NSN 5895-01-424-5615
NSN 5996-00-866-1356
NSN 5945-01-227-0876