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 5855-00-361-0167
NSN 6110-01-396-0017
NSN 6145-01-400-2849
NSN 5999-00-674-6488
NSN 6645-00-867-6724
NSN 5915-01-508-9350
NSN 5965-01-462-9340
NSN 5930-00-598-9680
NSN 5960-00-085-3995
NSN 5855-01-318-7663
NSN 5960-01-407-1350
NSN 5998-01-166-7686