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 6220-00-177-3086
NSN 5999-01-460-3492
NSN 5996-00-207-6086
NSN 5999-01-147-7045
NSN 5996-01-198-7706
NSN 6320-01-578-6006
NSN 5945-00-272-8958
NSN 6135-01-566-1034
NSN 4140-01-118-6848
NSN 6685-01-559-2832
NSN 5930-01-255-3094
NSN 6320-00-823-2015