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 6150-01-123-5417
NSN 6685-01-144-9004
NSN 6130-01-555-7854
NSN 5855-00-256-5562
NSN 5905-01-141-6633
NSN 5985-00-416-5683
NSN 5905-00-157-5708
NSN 6220-01-406-3167
NSN 6320-00-164-4087
NSN 6130-01-604-4661
NSN 5996-01-444-7283
NSN 5835-01-412-0344