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 5930-01-285-0926
NSN 6110-01-191-1335
NSN 5930-01-525-5299
NSN 6610-00-581-0771
NSN 5925-01-461-7586
NSN 5985-01-505-2203
NSN 5975-01-013-7837
NSN 5925-01-039-6220
NSN 5835-00-092-1136
NSN 6620-00-445-8325
NSN 6145-01-475-8099
NSN 6620-01-602-8402