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 5925-01-440-1187
NSN 5985-01-574-6924
NSN 7035-01-137-6206
NSN 6110-01-157-9085
NSN 6220-01-422-6375
NSN 5965-01-486-9586
NSN 6220-01-280-5353
NSN 4140-01-299-6713
NSN 6320-00-242-3300
NSN 5996-01-605-0950
NSN 5895-00-227-1002
NSN 6645-00-269-8440