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 5935-01-107-6751
NSN 5930-01-333-4291
NSN 5915-01-398-1860
NSN 6620-01-070-2215
NSN 6150-01-202-8214
NSN 6240-00-204-9355
NSN 5930-00-402-3950
NSN 5960-00-807-5272
NSN 5950-01-160-8176
NSN 6145-01-128-9083
NSN 7035-01-260-0804
NSN 5905-00-909-3433