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 5999-01-525-3251
NSN 5925-01-263-5990
NSN 6320-01-092-4101
NSN 5996-01-078-9803
NSN 7035-01-512-0334
NSN 5990-01-112-3901
NSN 5998-01-359-2579
NSN 5855-00-135-0162
NSN 6620-01-519-7234
NSN 6110-01-089-3296
NSN 5925-01-569-6755
NSN 5895-01-386-2835