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 6685-00-488-5591
NSN 6320-01-116-3980
NSN 5895-01-634-0630
NSN 5910-00-026-9056
NSN 5996-00-798-7589
NSN 5996-00-602-8824
NSN 5910-00-835-9069
NSN 6620-01-507-5283
NSN 5915-01-494-2078
NSN 5965-01-020-4104
NSN 5996-01-365-2246
NSN 5855-01-429-8702