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 6145-01-106-1252
NSN 6150-01-163-4427
NSN 6105-01-351-5998
NSN 5996-01-346-1099
NSN 6645-01-418-1657
NSN 6110-01-250-2936
NSN 6220-01-215-6983
NSN 5965-01-026-9865
NSN 6145-01-432-6503
NSN 6145-01-565-3201
NSN 6150-00-263-3451
NSN 4140-01-585-1570