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 5895-01-555-6731
NSN 5975-01-571-6478
NSN 5835-01-286-6499
NSN 5910-01-077-0188
NSN 5855-00-797-8217
NSN 7035-00-487-8761
NSN 5925-00-232-3256
NSN 2925-01-513-9114
NSN 5915-01-016-6341
NSN 6645-01-500-0827
NSN 5960-01-036-3839
NSN 6650-00-241-0970