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 5950-00-872-3376
NSN 5950-01-464-9798
NSN 5905-01-232-6445
NSN 6150-01-131-1589
NSN 5920-01-356-8381
NSN 6150-01-452-1117
NSN 6610-01-299-0601
NSN 5895-01-491-5469
NSN 6685-00-491-1101
NSN 5990-00-140-4559
NSN 5930-00-104-6148
NSN 5950-00-784-0754