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 5925-00-853-6198
NSN 5855-01-384-7120
NSN 5985-00-468-1360
NSN 6645-00-072-1909
NSN 5960-01-439-9517
NSN 5985-00-310-3263
NSN 5975-01-461-0799
NSN 6105-01-630-2239
NSN 6145-01-486-4247
NSN 5960-01-381-8475
NSN 5935-01-605-1403
NSN 4140-01-116-3138