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 6240-01-645-7751
NSN 5905-00-269-9673
NSN 2925-01-467-7672
NSN 5905-00-007-5519
NSN 5915-00-123-6722
NSN 5920-00-565-3877
NSN 5996-01-106-2763
NSN 5925-01-347-9161
NSN 6650-01-023-7002
NSN 5935-01-643-8168
NSN 5945-01-549-8368
NSN 5945-01-004-9646