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 5996-01-435-9387
NSN 5965-01-186-2051
NSN 5975-00-954-7961
NSN 5965-00-513-1352
NSN 5935-01-211-6851
NSN 6645-01-073-5302
NSN 5925-01-512-5100
NSN 5905-00-722-2243
NSN 6145-01-332-9171
NSN 7035-00-179-3924
NSN 6240-01-486-8317
NSN 5915-00-530-4493