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 6645-00-960-6594
NSN 6150-00-320-6212
NSN 6145-01-486-9588
NSN 6145-00-076-9324
NSN 5950-00-273-4003
NSN 6105-01-158-0458
NSN 5835-00-222-3956
NSN 6220-01-525-4975
NSN 6320-00-422-9006
NSN 6645-01-420-5623
NSN 5999-01-460-3248
NSN 6685-01-142-1969