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 5998-00-197-8607
NSN 5925-01-507-8258
NSN 6685-00-785-9342
NSN 5910-00-411-8596
NSN 6145-01-422-4485
NSN 4140-01-231-5031
NSN 5950-01-166-4328
NSN 5925-01-517-8612
NSN 5835-00-690-8898
NSN 5930-00-012-8400
NSN 4140-01-090-9161
NSN 5855-01-100-3272