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 5915-01-374-1173
NSN 5990-01-525-2250
NSN 6620-00-001-1398
NSN 5950-01-196-4983
NSN 5910-01-187-3311
NSN 5915-01-310-1929
NSN 5855-01-040-0107
NSN 6685-00-229-7350
NSN 5910-01-137-4561
NSN 5895-01-608-3588
NSN 7035-01-428-2336
NSN 6685-01-100-3012