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 6135-01-440-9412
NSN 5920-01-549-9647
NSN 6135-01-543-4256
NSN 5855-01-162-5251
NSN 6105-01-655-5110
NSN 5910-01-244-0343
NSN 6620-01-346-9340
NSN 6320-01-067-0474
NSN 5996-00-270-0340
NSN 6150-01-159-7657
NSN 5910-01-007-1532
NSN 5930-01-578-2247