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 5999-01-161-3176
NSN 2925-01-069-5324
NSN 5990-01-290-1425
NSN 5975-01-290-1982
NSN 6220-00-101-8799
NSN 6220-01-410-7555
NSN 5905-01-655-0793
NSN 5996-01-578-6955
NSN 5935-01-568-5838
NSN 5999-01-642-6481
NSN 5996-01-239-0385
NSN 5945-01-364-1950