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 6240-01-419-1010
NSN 5920-00-880-0947
NSN 5998-01-272-6014
NSN 5835-01-522-9881
NSN 6135-00-009-4100
NSN 5895-01-535-5975
NSN 6320-01-347-2638
NSN 5999-00-163-4496
NSN 5835-01-398-3859
NSN 5960-01-250-1095
NSN 6130-01-090-5752
NSN 4140-01-046-4932