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 6320-01-313-2709
NSN 5985-01-112-0455
NSN 6610-01-112-0447
NSN 2925-01-231-6312
NSN 6145-01-245-7292
NSN 5998-00-109-7180
NSN 5910-01-266-5443
NSN 5998-01-120-3236
NSN 5990-01-200-3711
NSN 5835-00-223-7235
NSN 5965-00-136-4178
NSN 5950-00-519-9515