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 4140-01-341-3310
NSN 5960-00-393-2505
NSN 5925-00-016-3758
NSN 5915-01-434-7781
NSN 6320-00-377-5683
NSN 5950-01-601-0046
NSN 5905-01-154-6767
NSN 6145-00-170-7947
NSN 5965-01-519-7056
NSN 6610-00-377-7956
NSN 5910-01-341-3115
NSN 5895-01-111-2975