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 5915-01-522-7416
NSN 5920-01-066-3709
NSN 6135-00-519-1325
NSN 6130-01-254-3260
NSN 5990-01-438-8228
NSN 6105-01-479-8988
NSN 5960-01-185-4216
NSN 6645-00-551-8291
NSN 5999-01-412-3828
NSN 6685-01-263-0419
NSN 5960-01-454-7064
NSN 5835-01-584-8538