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 5975-01-384-2394
NSN 5990-01-072-3575
NSN 6645-00-825-5677
NSN 6135-00-613-1068
NSN 5996-00-798-7589
NSN 6240-01-425-4143
NSN 5996-01-099-9238
NSN 6145-00-020-6708
NSN 5985-01-541-4033
NSN 6220-01-337-2933
NSN 6150-00-037-5118
NSN 5985-01-140-0092