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 5950-00-610-6144
NSN 5960-01-167-8796
NSN 6685-00-904-1599
NSN 2925-00-185-1618
NSN 5915-01-254-6608
NSN 5996-00-813-3304
NSN 6105-01-383-0325
NSN 6220-00-477-5946
NSN 5950-01-219-9667
NSN 5985-01-215-2210
NSN 5905-01-605-3577
NSN 5920-01-029-0284