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 5990-01-078-1294
NSN 5835-01-625-8604
NSN 6620-01-322-0018
NSN 7035-01-627-9427
NSN 7035-00-009-0099
NSN 5975-00-801-0638
NSN 5835-00-683-4612
NSN 5998-01-064-0720
NSN 5998-00-277-7552
NSN 5835-01-197-5673
NSN 6240-01-640-7265
NSN 5920-01-050-7474