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 5985-01-390-3679
NSN 6135-01-090-5365
NSN 5915-00-179-4623
NSN 5910-00-636-1085
NSN 6220-01-406-5891
NSN 5910-01-403-2812
NSN 5895-01-251-7869
NSN 6145-01-424-3364
NSN 5905-01-452-5669
NSN 6620-01-082-5997
NSN 6110-00-925-0480
NSN 6135-00-962-4111