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 5996-01-274-3980
NSN 6220-01-539-0923
NSN 6610-00-169-1384
NSN 5910-00-441-8810
NSN 5910-01-364-4689
NSN 6685-01-158-1184
NSN 5996-01-084-2054
NSN 5985-01-359-3162
NSN 5855-01-591-0466
NSN 4140-00-179-3977
NSN 5835-00-147-5062
NSN 5965-00-172-5103