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 6145-00-596-8447
NSN 4140-01-108-9084
NSN 5895-01-136-8182
NSN 5965-01-385-4235
NSN 6685-01-577-5887
NSN 5905-01-152-2580
NSN 5999-01-310-4092
NSN 5915-00-481-8023
NSN 6685-01-101-7149
NSN 6685-01-269-2991
NSN 5950-01-098-5281
NSN 6240-01-088-0389