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 6620-01-032-3937
NSN 4140-01-415-0941
NSN 5935-00-118-2905
NSN 4140-01-251-8387
NSN 6135-01-014-9755
NSN 5835-00-404-6149
NSN 6645-01-562-3960
NSN 6130-00-812-6175
NSN 6685-00-146-9358
NSN 5835-01-263-1293
NSN 5905-01-039-7047
NSN 6645-00-539-1705