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 5990-00-942-1846
NSN 5855-00-688-9954
NSN 5960-00-771-2824
NSN 5835-01-297-1909
NSN 6610-01-287-9814
NSN 2925-01-386-7392
NSN 5945-01-050-8453
NSN 5960-01-148-0074
NSN 4140-01-378-6710
NSN 6110-01-509-5517
NSN 6645-01-525-5181
NSN 6240-01-194-2206