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 5996-01-386-7421
NSN 5895-01-086-6238
NSN 5999-00-382-6007
NSN 6130-01-345-8386
NSN 2925-01-131-8761
NSN 6240-01-012-0831
NSN 5915-01-121-1339
NSN 5905-01-542-8836
NSN 5945-00-269-5375
NSN 6685-00-229-7350
NSN 5960-00-959-5226
NSN 6645-01-356-8252