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 5965-01-367-2595
NSN 6645-01-202-7986
NSN 5999-01-305-9299
NSN 6320-00-908-6841
NSN 6685-01-245-9862
NSN 6220-01-010-8242
NSN 5998-00-231-0251
NSN 6620-01-212-8089
NSN 6685-00-145-5269
NSN 5905-01-576-2338
NSN 6145-00-546-6226
NSN 6610-01-013-3423