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 5985-01-369-4721
NSN 5895-01-216-8604
NSN 6620-01-365-1499
NSN 6130-01-250-1274
NSN 5975-01-528-8520
NSN 7035-00-206-6123
NSN 5910-00-822-5270
NSN 5990-00-125-5036
NSN 5950-01-192-1560
NSN 7035-00-252-7467
NSN 6645-00-392-8728
NSN 5960-01-125-2356