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 4140-00-057-5597
NSN 2925-01-150-7160
NSN 7035-00-020-2227
NSN 5998-00-186-8583
NSN 6240-00-099-8606
NSN 5905-01-537-9647
NSN 2925-01-239-6044
NSN 5895-00-814-8462
NSN 4140-00-862-5644
NSN 6240-01-045-5425
NSN 5965-00-768-4366
NSN 5990-00-506-8315