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 6135-01-090-5365
NSN 4140-00-009-8803
NSN 5960-01-406-3672
NSN 6220-00-054-5741
NSN 5999-00-847-1541
NSN 6130-00-836-1450
NSN 2925-01-271-8727
NSN 6220-01-580-2420
NSN 6650-00-698-5869
NSN 5945-01-571-6997
NSN 5985-01-473-0667
NSN 6105-01-540-8651