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 6610-00-107-1944
NSN 5945-01-520-4939
NSN 5996-01-131-2765
NSN 6130-01-167-7418
NSN 5950-00-793-1847
NSN 5835-01-345-5090
NSN 6650-00-172-7519
NSN 5945-01-429-0217
NSN 6145-01-651-7291
NSN 5905-01-462-5086
NSN 5999-01-177-8243
NSN 5915-01-392-5579