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 6130-00-753-7732
NSN 5910-00-726-6318
NSN 5835-01-182-1966
NSN 5996-01-267-2791
NSN 4140-00-557-7001
NSN 5990-01-187-2981
NSN 6610-01-437-2506
NSN 5996-01-411-9718
NSN 5950-01-033-6480
NSN 5985-00-321-7735
NSN 5905-01-376-3883
NSN 6105-01-360-3468