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 6610-01-564-0667
NSN 6610-01-226-7612
NSN 5930-00-406-6474
NSN 5925-00-934-3365
NSN 6110-00-112-1476
NSN 6685-00-982-1960
NSN 6105-01-163-8827
NSN 5915-00-561-6528
NSN 6145-01-493-1892
NSN 6220-01-076-4383
NSN 5935-00-241-9620
NSN 6145-01-657-2283