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 5990-01-109-2938
NSN 5895-00-799-3221
NSN 6130-01-350-2940
NSN 6105-01-010-3512
NSN 5855-01-249-8456
NSN 5915-00-089-3274
NSN 6685-01-496-4688
NSN 6650-01-016-0406
NSN 5835-01-343-7516
NSN 5905-01-145-4552
NSN 6220-01-217-9414
NSN 4140-01-207-0452