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 7035-00-421-8710
NSN 5985-01-106-0807
NSN 5920-01-213-1513
NSN 6110-00-455-2348
NSN 5930-01-131-6987
NSN 6320-01-300-7994
NSN 6610-01-171-3010
NSN 6685-01-351-9055
NSN 6110-01-316-0744
NSN 5920-00-269-6178
NSN 5920-01-011-9378
NSN 2925-01-435-9057