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 6645-01-267-5505
NSN 5965-01-041-6822
NSN 5855-00-494-9581
NSN 5999-01-139-4275
NSN 6685-01-281-7267
NSN 7035-01-141-8076
NSN 5915-01-074-4530
NSN 5905-01-087-3174
NSN 6130-01-595-6760
NSN 6320-01-504-3948
NSN 6145-00-503-6301
NSN 7035-00-205-1932