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 6320-00-557-3079
NSN 6620-01-426-2220
NSN 6105-01-338-9725
NSN 6110-01-323-5273
NSN 6150-00-170-8008
NSN 5998-01-099-6249
NSN 7035-01-187-4286
NSN 6645-00-200-2324
NSN 6240-00-115-0795
NSN 5855-01-027-1571
NSN 7035-01-578-5403
NSN 5998-00-205-2951