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 6240-01-568-6745
NSN 5835-00-859-8330
NSN 6150-00-312-2164
NSN 5905-01-608-5483
NSN 5895-01-260-8581
NSN 5950-00-498-3507
NSN 4140-01-085-4965
NSN 5960-01-011-2085
NSN 5990-01-253-5011
NSN 5945-01-256-7968
NSN 5985-01-158-5645
NSN 2925-01-226-6126