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 5950-00-352-7261
NSN 5905-01-194-2282
NSN 5930-01-451-4331
NSN 5930-01-634-0659
NSN 6685-00-264-3986
NSN 5905-01-498-9477
NSN 5930-00-369-1645
NSN 6135-01-385-7276
NSN 5945-01-358-2664
NSN 5935-00-202-9480
NSN 6320-01-459-6992
NSN 7035-00-135-4758