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 5855-00-256-5562
NSN 6145-01-503-2394
NSN 6240-00-445-4765
NSN 7035-01-516-6657
NSN 6620-00-100-4517
NSN 5915-00-185-5355
NSN 5905-00-734-0804
NSN 2925-00-964-7128
NSN 5905-00-199-5981
NSN 6685-01-263-3552
NSN 5950-00-874-7476
NSN 6110-01-487-4532