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 5945-01-550-5335
NSN 5999-00-991-0840
NSN 5920-01-096-1864
NSN 5930-01-634-0659
NSN 5920-01-343-2769
NSN 6685-01-391-7375
NSN 6220-00-706-2772
NSN 5950-00-519-9398
NSN 5960-00-654-7300
NSN 6110-01-307-2956
NSN 6135-00-016-0071
NSN 5910-01-207-3566