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 6220-01-642-7904
NSN 5960-00-170-6916
NSN 6145-00-141-8095
NSN 5950-01-011-4258
NSN 6650-01-191-1669
NSN 6320-00-841-2279
NSN 5930-01-215-1168
NSN 5930-00-274-7167
NSN 6105-01-351-9008
NSN 5996-01-297-9385
NSN 5930-01-602-9020
NSN 5985-00-072-4957