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 2925-00-278-9468
NSN 5999-00-912-9163
NSN 5925-00-290-4451
NSN 5999-01-503-6136
NSN 6685-00-317-4319
NSN 5925-01-281-5503
NSN 7035-00-631-3782
NSN 6110-01-268-0418
NSN 4140-01-025-1555
NSN 5975-01-437-5961
NSN 6135-01-067-8331
NSN 5950-01-521-3985