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 5895-00-335-7443
NSN 6650-01-409-1992
NSN 5915-01-505-1685
NSN 5965-01-417-3211
NSN 7035-00-020-2227
NSN 6220-00-643-4045
NSN 6320-00-036-3688
NSN 6610-01-183-4470
NSN 5915-00-413-4623
NSN 5975-01-136-2258
NSN 6105-01-371-9203
NSN 6645-01-513-0117