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 6240-01-152-7046
NSN 5915-01-365-4981
NSN 5925-01-513-9924
NSN 5855-00-548-4742
NSN 5910-01-534-3722
NSN 6320-01-067-0474
NSN 5855-01-020-7982
NSN 5975-00-144-7878
NSN 6320-01-618-7800
NSN 6685-01-560-3020
NSN 5895-01-034-9236
NSN 6240-01-215-8485