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 6620-01-365-1499
NSN 5855-01-203-4719
NSN 6620-01-312-6350
NSN 4140-00-981-8580
NSN 5915-01-633-9845
NSN 6220-01-570-6975
NSN 6620-01-421-3370
NSN 5925-00-942-8202
NSN 5960-01-599-4726
NSN 6145-01-624-5346
NSN 5965-01-028-6206
NSN 5905-00-161-3358