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 6220-01-426-8824
NSN 6145-00-257-0136
NSN 6130-01-386-1211
NSN 5920-01-487-8597
NSN 5985-01-400-5948
NSN 6645-01-032-5337
NSN 6135-00-369-2368
NSN 5835-01-491-4613
NSN 5999-00-008-8623
NSN 5999-01-063-7408
NSN 5950-01-626-3818
NSN 5930-01-463-5384