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 6320-01-397-9995
NSN 6220-01-076-5345
NSN 4140-00-844-9436
NSN 6110-00-717-3554
NSN 5920-01-047-4682
NSN 5996-00-086-9352
NSN 2925-00-312-8568
NSN 5960-01-247-1994
NSN 5960-00-230-8579
NSN 6240-01-384-3887
NSN 6130-01-312-4562
NSN 5975-00-525-2331