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 5950-00-111-2000
NSN 5965-01-479-9155
NSN 5835-01-442-6482
NSN 5920-01-318-1702
NSN 6105-01-514-7310
NSN 5985-00-532-0846
NSN 6620-00-071-8778
NSN 5960-01-362-3846
NSN 5950-00-589-2869
NSN 2925-00-836-9543
NSN 5925-01-423-7803
NSN 5930-01-576-5346