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 6685-01-258-0416
NSN 6105-00-279-3044
NSN 5915-00-099-0347
NSN 6645-01-394-5149
NSN 5930-00-385-3653
NSN 4140-00-365-2531
NSN 2925-00-774-8247
NSN 5950-00-555-2881
NSN 5905-01-080-0662
NSN 2925-01-074-9102
NSN 5990-01-529-8433
NSN 6110-01-220-0518