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 5925-01-529-9521
NSN 6645-01-194-3214
NSN 6220-00-279-1508
NSN 5855-00-494-9581
NSN 5990-01-328-7396
NSN 5999-00-672-5807
NSN 5925-01-185-9897
NSN 6620-01-331-5679
NSN 6610-01-160-8815
NSN 5950-01-210-0713
NSN 6620-00-075-6667
NSN 5920-01-581-0015