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 6645-01-294-6403
NSN 6110-01-010-4551
NSN 5985-01-190-9758
NSN 5985-01-152-2022
NSN 6145-01-538-7185
NSN 5965-00-431-2492
NSN 5910-01-389-4042
NSN 4140-01-299-7704
NSN 5950-01-289-5205
NSN 6220-01-409-1585
NSN 6150-01-315-1487
NSN 5990-01-414-7618