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 5999-01-371-3000
NSN 6645-00-732-7789
NSN 5950-00-649-9898
NSN 2925-01-084-3347
NSN 6645-00-570-8472
NSN 5930-01-501-5073
NSN 5905-01-546-1049
NSN 5895-00-087-7088
NSN 5960-00-264-9519
NSN 5910-01-423-9485
NSN 5935-01-659-0698
NSN 6150-01-448-9013