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 6240-01-004-8790
NSN 5996-01-607-7035
NSN 6645-01-461-1542
NSN 6620-01-279-4353
NSN 6620-01-375-6741
NSN 5996-01-119-9908
NSN 5905-00-592-4616
NSN 6240-00-170-5302
NSN 5950-01-235-4262
NSN 6220-01-640-9546
NSN 5925-00-840-9071
NSN 6645-01-247-4549