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 6685-01-201-3455
NSN 6130-00-925-2303
NSN 6110-00-126-4875
NSN 5960-01-357-1261
NSN 6645-01-547-8490
NSN 5950-01-422-2924
NSN 5895-01-059-8866
NSN 6220-00-104-5365
NSN 5996-00-330-9184
NSN 5930-01-251-0602
NSN 6610-00-230-8675
NSN 5895-01-654-7096