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 6685-01-370-5258
NSN 5835-00-902-8680
NSN 5855-01-467-0128
NSN 5945-01-203-9002
NSN 6220-00-925-2233
NSN 6145-00-216-6613
NSN 6220-01-299-2298
NSN 5855-01-109-6433
NSN 5990-01-056-0893
NSN 5985-01-372-2211
NSN 6150-01-534-3379
NSN 5915-01-360-1325