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 5950-01-650-4476
NSN 6135-00-161-0746
NSN 5925-01-193-4306
NSN 4140-00-150-8265
NSN 6320-01-624-0193
NSN 5950-01-214-8923
NSN 5996-01-312-0790
NSN 5990-00-905-2474
NSN 5985-01-003-1277
NSN 5930-00-473-0570
NSN 6130-01-140-9990
NSN 5935-01-322-2669