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 5960-00-140-9583
NSN 5855-01-162-5251
NSN 5985-01-258-5943
NSN 5960-01-341-8484
NSN 5990-01-160-6978
NSN 4140-01-615-6751
NSN 6220-00-578-6539
NSN 5920-01-454-0337
NSN 6220-01-466-5084
NSN 6620-01-054-9346
NSN 5950-01-590-3921
NSN 6685-01-561-5985