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 6110-00-988-6875
NSN 6645-00-342-5956
NSN 6610-01-489-0071
NSN 6685-00-055-7656
NSN 6145-00-158-5549
NSN 6685-00-720-3525
NSN 5915-00-189-0773
NSN 5999-00-362-0865
NSN 5920-01-581-0015
NSN 5920-01-075-7116
NSN 5905-01-336-5303
NSN 6145-01-494-8123