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 5925-00-529-0441
NSN 6645-01-400-1137
NSN 6610-00-450-0796
NSN 4140-01-362-0446
NSN 6145-00-072-9382
NSN 4140-01-166-0028
NSN 5945-00-144-0071
NSN 5965-01-571-5065
NSN 5975-01-517-9485
NSN 5960-01-378-1729
NSN 5998-01-211-6035
NSN 7035-01-129-7834