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 6620-01-380-4882
NSN 5945-00-448-7765
NSN 6320-00-004-9158
NSN 6610-01-338-8531
NSN 5855-01-598-7392
NSN 6220-00-404-8004
NSN 5835-01-152-9483
NSN 6105-01-462-5727
NSN 5965-00-087-0523
NSN 5925-00-504-0996
NSN 5910-01-423-8567
NSN 5945-01-093-7890