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 5945-00-080-5619
NSN 5935-01-421-1802
NSN 5996-00-061-0336
NSN 5910-00-760-6877
NSN 5998-00-346-1319
NSN 5999-01-391-5646
NSN 6110-00-389-6600
NSN 5915-01-485-0222
NSN 2925-01-183-2897
NSN 5950-00-905-7995
NSN 4140-00-245-0799
NSN 6645-01-398-1691