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 5945-00-917-9714
NSN 5965-00-983-1815
NSN 5985-01-496-2089
NSN 6135-01-244-3211
NSN 6145-01-088-9627
NSN 6105-01-123-1937
NSN 6105-01-462-1657
NSN 6130-00-266-7496
NSN 5895-01-555-8226
NSN 6135-00-938-1351
NSN 6105-01-539-0219
NSN 6645-01-513-4782