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 5925-01-397-7639
NSN 5915-01-190-9476
NSN 5950-01-146-7860
NSN 5835-01-545-2629
NSN 5905-01-097-8607
NSN 6320-01-527-0211
NSN 6105-01-149-6639
NSN 6610-01-640-9367
NSN 5910-01-201-5280
NSN 5975-01-188-4695
NSN 6150-01-430-3601
NSN 6220-01-627-3940