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 6135-01-322-4655
NSN 5930-01-351-8953
NSN 6240-01-442-6770
NSN 5960-01-362-3846
NSN 4140-00-983-4083
NSN 5835-00-233-6327
NSN 5960-00-447-0689
NSN 6135-01-010-0891
NSN 6685-00-377-9044
NSN 5999-01-520-3231
NSN 5975-00-292-3250
NSN 5990-01-183-0765