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 5935-01-167-6158
NSN 4140-01-196-7490
NSN 5990-00-067-6791
NSN 5945-01-214-0388
NSN 6220-01-158-0918
NSN 6650-01-529-4601
NSN 6110-00-916-8021
NSN 6105-00-949-3693
NSN 6620-01-434-3675
NSN 5945-00-847-4768
NSN 6620-01-156-0814
NSN 5910-00-943-9888