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 6130-01-294-1149
NSN 5996-01-323-6008
NSN 6145-00-856-6292
NSN 6240-01-172-5294
NSN 5996-01-057-1981
NSN 5950-01-201-0264
NSN 6620-00-635-7347
NSN 6105-01-507-3012
NSN 5920-01-104-4332
NSN 6145-00-167-6667
NSN 6135-00-243-8330
NSN 7035-01-268-0933