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 5930-00-244-6927
NSN 5895-01-102-3332
NSN 6135-01-424-1114
NSN 5925-01-222-0835
NSN 6110-00-056-8133
NSN 5950-00-452-7265
NSN 5925-01-545-0643
NSN 6610-00-395-2574
NSN 6135-01-292-1071
NSN 6685-00-545-3163
NSN 6650-01-078-5587
NSN 6610-00-823-9159