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 5960-01-449-1310
NSN 5996-00-940-8927
NSN 6130-01-432-1327
NSN 5935-01-450-7257
NSN 6145-01-274-8396
NSN 5930-01-389-4086
NSN 5915-01-200-8283
NSN 6685-01-226-7593
NSN 5975-01-437-8869
NSN 5910-01-351-5534
NSN 5998-01-252-8623
NSN 7035-01-240-0541