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 5998-01-055-8166
NSN 2925-01-415-0264
NSN 6645-01-603-9331
NSN 5855-00-904-0684
NSN 5950-00-280-7825
NSN 5996-01-484-7449
NSN 6240-00-156-1607
NSN 5950-00-827-3063
NSN 6610-00-300-4774
NSN 5975-00-102-9639
NSN 5975-01-407-0156
NSN 6135-01-478-9316