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 6130-00-045-7186
NSN 6240-01-063-7685
NSN 6240-01-547-6444
NSN 5945-01-587-7544
NSN 6610-01-389-3082
NSN 5835-01-531-0379
NSN 6135-01-610-1124
NSN 5855-01-532-7513
NSN 5905-00-797-1062
NSN 5910-00-267-5381
NSN 6105-01-576-8191
NSN 6645-01-177-6021