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 5975-00-777-3591
NSN 5835-00-168-4258
NSN 7035-01-363-4540
NSN 5835-01-504-0837
NSN 6105-01-547-0705
NSN 5996-01-324-9167
NSN 6620-01-328-7059
NSN 6240-00-272-8601
NSN 6685-01-464-2209
NSN 5975-01-429-8609
NSN 6135-01-038-6225
NSN 6620-01-557-6512