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 5950-01-543-2501
NSN 6135-00-170-8819
NSN 6130-00-431-8804
NSN 6685-01-340-6824
NSN 5996-01-034-7616
NSN 5999-01-378-6856
NSN 5960-01-167-8796
NSN 5999-01-392-2158
NSN 5975-01-029-0147
NSN 6610-00-288-5655
NSN 6220-01-327-1802
NSN 5935-01-136-3475