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 5998-01-171-3074
NSN 5925-00-409-5577
NSN 5960-01-163-8905
NSN 5985-01-503-9801
NSN 5930-00-499-7246
NSN 6145-00-102-8968
NSN 6135-01-171-9299
NSN 5895-00-233-5901
NSN 4140-01-385-7697
NSN 5945-01-429-9824
NSN 6645-01-080-3510
NSN 6320-01-631-7828