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 6645-01-409-2003
NSN 5930-01-170-4018
NSN 5910-01-322-4904
NSN 5915-00-181-9223
NSN 6685-01-055-7384
NSN 5960-01-317-3800
NSN 6610-01-452-5180
NSN 6320-01-420-0340
NSN 6645-00-445-8143
NSN 6645-01-459-7788
NSN 6105-00-234-9949
NSN 5965-01-510-1902