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 6645-00-862-2904
NSN 5996-01-443-8755
NSN 6135-01-124-2376
NSN 5935-00-143-8275
NSN 6240-00-172-5866
NSN 5915-00-463-9337
NSN 6620-01-401-5356
NSN 6135-01-339-8064
NSN 6650-01-381-2972
NSN 6220-00-314-1751
NSN 6105-01-519-4583
NSN 5975-00-460-8784