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 6130-00-450-4454
NSN 5975-01-539-6519
NSN 5835-00-583-1316
NSN 5960-01-167-8796
NSN 6645-01-347-0450
NSN 6135-00-998-5884
NSN 6620-01-014-7192
NSN 6645-01-221-9424
NSN 6220-01-501-4476
NSN 6150-00-091-6939
NSN 6110-00-239-9248
NSN 5930-01-053-8661