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 6320-01-347-2638
NSN 5915-00-278-5561
NSN 5960-00-901-5745
NSN 5945-00-043-0369
NSN 6645-00-736-0476
NSN 6620-00-319-4044
NSN 6130-01-025-1540
NSN 6110-00-171-2214
NSN 6645-01-464-4937
NSN 5915-00-275-2142
NSN 6105-01-304-4388
NSN 6650-01-041-0296