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 5895-00-328-9314
NSN 5925-01-099-4702
NSN 5998-01-301-2467
NSN 5998-01-262-2193
NSN 6130-01-423-1383
NSN 6135-00-100-0485
NSN 6240-01-190-9523
NSN 5915-00-337-0811
NSN 5999-00-864-4018
NSN 5996-01-055-6207
NSN 5975-00-207-9695
NSN 6645-01-192-4079