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 6105-00-388-6572
NSN 5945-01-511-2009
NSN 5996-00-187-1424
NSN 5855-00-797-8217
NSN 6135-00-145-8884
NSN 6685-01-263-3552
NSN 6220-01-038-8292
NSN 6105-00-535-2630
NSN 5999-01-381-3663
NSN 5855-01-656-6330
NSN 6620-00-155-2608
NSN 5960-01-165-1956