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 6610-01-451-3877
NSN 6105-00-505-1173
NSN 6220-01-276-5399
NSN 6610-00-049-6497
NSN 5960-01-337-5339
NSN 5835-01-544-2035
NSN 6685-01-643-7078
NSN 6620-01-318-8314
NSN 5925-01-602-7521
NSN 5910-01-555-8811
NSN 6650-00-115-6654
NSN 2925-00-001-4604