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 5950-01-654-4457
NSN 7035-00-763-6180
NSN 5999-01-050-3610
NSN 6650-01-529-6721
NSN 6620-01-446-6571
NSN 5996-00-493-7965
NSN 5915-00-275-2142
NSN 5950-00-308-0948
NSN 5855-00-832-9341
NSN 5999-01-004-9896
NSN 5999-00-232-7782
NSN 6645-01-257-2856