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 6145-00-482-9546
NSN 6650-01-097-6814
NSN 6220-01-098-8171
NSN 6105-01-586-7780
NSN 6320-01-436-0513
NSN 6135-01-441-7922
NSN 5915-01-440-3998
NSN 5998-01-210-2079
NSN 6645-01-101-4959
NSN 5990-01-286-0601
NSN 6320-01-183-8196
NSN 5965-01-451-2481