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 5915-00-523-1968
NSN 6685-01-261-4984
NSN 5999-01-646-6566
NSN 5935-00-719-4189
NSN 6145-00-954-5121
NSN 7035-00-517-8232
NSN 7035-00-543-3272
NSN 5930-01-223-4017
NSN 5855-01-381-6052
NSN 5985-01-288-0623
NSN 6645-00-716-8049
NSN 5975-01-371-4609