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 6130-01-172-3134
NSN 6150-00-452-9078
NSN 5960-01-252-4153
NSN 2925-01-197-7864
NSN 6240-01-159-5043
NSN 5975-00-476-1512
NSN 6610-01-339-1595
NSN 4140-00-913-4209
NSN 5905-01-584-3124
NSN 6650-01-406-5322
NSN 6685-00-828-1521
NSN 5999-01-362-5906