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 6220-01-146-4469
NSN 6240-01-209-3340
NSN 5895-01-164-0575
NSN 7035-01-568-9555
NSN 5996-01-170-1915
NSN 5905-01-578-7330
NSN 6110-00-980-9292
NSN 5920-01-383-0300
NSN 5996-01-323-6008
NSN 6145-01-258-6673
NSN 5905-01-357-2385
NSN 7035-01-080-8742