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 6320-01-233-5798
NSN 4140-01-420-6508
NSN 5998-00-240-5320
NSN 6320-01-547-2743
NSN 2925-01-064-3729
NSN 5930-01-386-5189
NSN 6110-01-386-6320
NSN 5835-01-548-1143
NSN 5975-01-573-7027
NSN 6130-01-152-3207
NSN 7035-01-010-8309
NSN 6130-01-050-9866