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 6135-01-201-5858
NSN 5895-01-437-2384
NSN 5990-00-104-4903
NSN 5990-00-460-9394
NSN 5945-01-061-1750
NSN 5920-00-895-3270
NSN 6110-01-035-0427
NSN 5915-01-196-9426
NSN 5975-00-448-3179
NSN 6145-00-884-8112
NSN 5996-01-440-9660
NSN 5855-01-534-4577