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 5998-01-313-5206
NSN 5960-00-978-4695
NSN 5915-00-054-6637
NSN 5920-00-481-8945
NSN 6150-01-615-5218
NSN 5905-01-083-9270
NSN 5975-01-275-6148
NSN 5910-01-182-6481
NSN 5996-01-470-1404
NSN 5855-01-481-3906
NSN 2925-01-463-8856
NSN 5985-01-206-4729