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 5945-01-354-5173
NSN 6320-01-017-5274
NSN 2925-01-446-6976
NSN 6685-01-367-3675
NSN 5905-00-458-9651
NSN 5925-00-150-1072
NSN 5985-01-555-8481
NSN 6620-01-512-3032
NSN 6685-01-315-8618
NSN 2925-01-043-9786
NSN 5835-00-228-9082
NSN 5935-01-131-1752