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 5975-01-179-3782
NSN 6645-00-230-4396
NSN 5935-00-300-2577
NSN 5915-00-974-9337
NSN 5925-00-569-7405
NSN 5975-00-116-0803
NSN 5905-01-419-4647
NSN 5985-00-419-0342
NSN 5985-00-032-7023
NSN 6110-00-394-7187
NSN 4140-01-449-5965
NSN 6220-01-187-8459