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 5965-00-617-5731
NSN 5910-01-361-8864
NSN 5930-00-807-7988
NSN 5915-01-303-6560
NSN 5996-01-088-8715
NSN 5925-01-382-9313
NSN 5935-01-345-2989
NSN 6105-00-856-8709
NSN 6645-01-452-9495
NSN 6650-01-186-2426
NSN 6685-00-821-7533
NSN 6220-01-653-6479