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 5990-00-212-4316
NSN 6150-01-029-1673
NSN 6620-01-144-2488
NSN 6620-00-155-2608
NSN 6130-00-144-8018
NSN 6685-00-223-5816
NSN 6610-00-799-8315
NSN 5930-01-444-4074
NSN 6110-00-754-7926
NSN 5950-00-551-9473
NSN 6240-00-703-6614
NSN 6650-01-341-8097