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 6130-01-409-1443
NSN 4140-01-327-7085
NSN 6620-01-573-1952
NSN 5975-00-215-3810
NSN 6105-00-446-0068
NSN 5996-01-310-6240
NSN 5920-00-606-1242
NSN 5925-01-141-7973
NSN 6220-01-170-5335
NSN 6150-01-551-1191
NSN 5960-00-959-7413
NSN 5985-01-587-9073