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 5990-01-378-7349
NSN 6130-01-459-9639
NSN 6105-00-915-2657
NSN 6105-01-213-9060
NSN 7035-01-196-3445
NSN 4140-01-487-4394
NSN 5975-01-651-0339
NSN 5998-00-457-0845
NSN 5945-01-644-7457
NSN 5945-00-755-2301
NSN 6145-01-057-7267
NSN 6130-00-106-3557