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 6150-01-032-4556
NSN 6220-01-578-7084
NSN 5950-01-569-1538
NSN 6220-01-207-1229
NSN 6685-00-166-7439
NSN 6105-01-627-7930
NSN 6105-01-200-1689
NSN 5855-01-229-3864
NSN 6150-00-023-4968
NSN 5920-01-434-8503
NSN 2925-00-355-5130
NSN 5925-01-560-6306