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 6145-01-521-7154
NSN 6135-00-057-2005
NSN 5985-00-151-3981
NSN 6130-01-577-9197
NSN 2925-01-103-9419
NSN 5855-00-941-6412
NSN 5855-01-035-2866
NSN 5960-00-078-9500
NSN 6105-01-422-2292
NSN 6620-00-514-6365
NSN 5985-00-476-7313
NSN 5835-00-924-4268