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 6150-00-764-9257
NSN 6105-01-437-5501
NSN 6685-01-205-0467
NSN 5855-01-085-5354
NSN 6150-01-227-0452
NSN 6135-00-803-3012
NSN 6110-01-168-8600
NSN 5999-01-135-2087
NSN 5996-01-291-3076
NSN 6610-01-111-1954
NSN 6240-01-084-1517
NSN 5915-01-484-1820