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 6110-01-507-0457
NSN 6150-01-641-3519
NSN 6685-01-418-8218
NSN 6105-00-878-7750
NSN 5996-01-271-1542
NSN 6145-01-519-5345
NSN 5950-01-224-7226
NSN 5950-01-430-3338
NSN 5965-00-894-0015
NSN 5915-01-231-9174
NSN 6135-01-038-6225
NSN 4140-00-501-7833