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 6220-00-200-7888
NSN 5960-00-547-9180
NSN 5960-01-525-1690
NSN 5965-01-005-0341
NSN 5925-01-572-3263
NSN 6610-00-225-9886
NSN 5975-01-559-0841
NSN 5930-00-910-4318
NSN 6320-00-646-3311
NSN 6650-00-690-8709
NSN 5905-01-214-8891
NSN 5915-01-447-1472