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 5920-01-419-5271
NSN 6145-01-186-3532
NSN 6240-01-046-4363
NSN 5905-01-110-6187
NSN 6240-01-310-8778
NSN 6220-01-020-6181
NSN 6320-01-631-7828
NSN 6105-01-485-9204
NSN 6645-01-372-4149
NSN 5975-01-032-5982
NSN 6110-01-479-9528
NSN 5935-01-513-8032