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 6685-01-642-7345
NSN 5960-00-617-9312
NSN 6685-00-611-3949
NSN 6320-01-123-6814
NSN 6150-01-080-9384
NSN 5990-01-434-7913
NSN 6620-00-199-8734
NSN 6320-01-211-2574
NSN 2925-00-215-4954
NSN 5915-00-035-4462
NSN 6650-01-069-5464
NSN 5975-00-243-5698