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 6240-00-182-7944
NSN 5965-01-543-9490
NSN 5910-01-137-0152
NSN 4140-01-451-3774
NSN 6220-00-168-5756
NSN 2925-01-562-8051
NSN 6145-01-261-1940
NSN 6145-00-871-5361
NSN 5920-01-502-5838
NSN 6130-01-252-6397
NSN 5855-01-534-3724
NSN 5960-01-413-3877