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 6620-00-018-2196
NSN 6130-00-165-6365
NSN 5998-00-857-7114
NSN 5950-00-443-4009
NSN 5905-01-576-9940
NSN 6240-01-048-3330
NSN 5985-01-157-8427
NSN 6130-00-327-0221
NSN 5925-00-270-6005
NSN 2925-00-398-0253
NSN 5990-01-118-0151
NSN 5835-01-307-8954