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 6320-00-459-8973
NSN 5910-00-544-4013
NSN 5925-01-193-0171
NSN 6130-01-481-7312
NSN 6220-00-056-1569
NSN 5855-00-198-3197
NSN 2925-01-009-9560
NSN 5925-01-078-6673
NSN 5960-01-462-1864
NSN 5975-00-586-6031
NSN 6620-01-144-2488
NSN 5945-01-204-3507