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 5975-00-394-2545
NSN 5915-01-123-9956
NSN 6220-01-077-3461
NSN 5920-01-644-7352
NSN 6220-01-423-2814
NSN 6130-00-912-4190
NSN 6620-01-331-9031
NSN 5905-01-215-1896
NSN 6110-01-157-9341
NSN 5960-01-094-5958
NSN 5990-01-178-4033
NSN 6650-00-140-8776