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 5930-01-396-7435
NSN 6145-01-095-8456
NSN 6220-00-181-9698
NSN 6220-00-609-3345
NSN 6645-00-079-1430
NSN 6610-01-202-7404
NSN 5975-01-089-9399
NSN 5905-01-613-0878
NSN 7035-01-096-8912
NSN 6620-01-343-4920
NSN 5935-01-475-4762
NSN 5990-01-458-9576