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 6645-01-237-2568
NSN 5998-01-006-5845
NSN 5950-00-199-8153
NSN 6645-01-147-6577
NSN 6685-01-357-6358
NSN 6685-01-252-8887
NSN 5910-00-968-0456
NSN 2925-01-420-2362
NSN 2925-00-549-6759
NSN 5915-00-199-9554
NSN 5975-00-862-4506
NSN 5996-01-382-9710