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 6320-00-593-0379
NSN 5905-01-146-4076
NSN 6620-01-306-1347
NSN 5985-00-466-1015
NSN 5895-00-625-5424
NSN 5910-01-333-2409
NSN 6320-00-369-7796
NSN 5910-01-512-8782
NSN 6220-01-392-4835
NSN 6320-01-207-0636
NSN 5996-00-471-0540
NSN 2925-01-218-5556