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 5855-01-100-3272
NSN 6320-00-681-1324
NSN 6240-01-356-5855
NSN 6645-01-195-6207
NSN 5990-01-306-7642
NSN 6240-00-965-7997
NSN 6135-01-625-0765
NSN 5910-01-531-8685
NSN 6320-01-384-3850
NSN 6610-01-594-2863
NSN 6610-01-203-8098
NSN 2925-01-250-2731