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 6610-01-418-5787
NSN 7035-00-043-1325
NSN 5985-00-683-2188
NSN 6240-00-140-4184
NSN 6620-01-368-2723
NSN 6145-01-581-6020
NSN 5950-00-015-1537
NSN 5950-00-184-6836
NSN 6240-01-628-0765
NSN 5905-00-838-5487
NSN 6650-01-290-0454
NSN 2925-01-076-5219