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 5999-01-591-3824
NSN 5996-00-166-0037
NSN 5895-00-075-3519
NSN 6130-01-648-4169
NSN 5950-01-453-7312
NSN 5920-01-138-4984
NSN 5910-00-209-6243
NSN 5905-00-472-4851
NSN 5930-01-373-9829
NSN 6645-01-167-5814
NSN 6135-01-101-5039
NSN 5920-01-413-8513