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 5960-00-929-5242
NSN 6645-01-451-1295
NSN 6650-01-073-5925
NSN 6150-01-442-7622
NSN 5930-00-552-0707
NSN 6135-01-090-5365
NSN 5920-00-931-7979
NSN 6220-01-051-3865
NSN 6220-01-388-0823
NSN 6610-00-557-0900
NSN 6150-01-143-0138
NSN 6610-01-227-0364