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 6135-01-593-9256
NSN 5915-01-372-3672
NSN 5950-01-433-4485
NSN 6135-01-141-4916
NSN 5925-00-403-4061
NSN 6110-01-235-2233
NSN 6135-01-657-0554
NSN 5930-01-098-2521
NSN 6150-01-222-0667
NSN 5996-01-094-5587
NSN 5950-00-460-0833
NSN 6145-00-981-3224