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 7035-01-603-7150
NSN 5999-01-654-9504
NSN 6685-01-205-3296
NSN 5975-01-160-8617
NSN 5960-01-564-5044
NSN 5985-01-167-6582
NSN 6610-01-476-7412
NSN 6150-00-909-7339
NSN 5895-01-484-0357
NSN 5998-01-287-3267
NSN 5855-01-341-7320
NSN 5950-00-763-3133