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 6145-00-010-1425
NSN 6110-01-361-1837
NSN 5996-01-364-7934
NSN 5915-01-252-2929
NSN 6135-01-551-0562
NSN 5945-00-338-3733
NSN 5895-01-411-9985
NSN 6685-00-186-9190
NSN 5960-00-960-6805
NSN 6685-01-251-0110
NSN 6150-01-014-5691
NSN 5905-01-127-8450