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 5999-00-465-1288
NSN 4140-00-702-4647
NSN 5965-01-440-3421
NSN 5985-01-282-9880
NSN 6130-01-455-4530
NSN 5996-01-530-0823
NSN 5945-01-389-6134
NSN 5925-01-386-3178
NSN 5895-01-180-9651
NSN 6620-01-448-1423
NSN 5930-01-449-1265
NSN 5950-01-414-2611