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 5920-01-417-3142
NSN 4140-00-621-9226
NSN 5985-00-505-4169
NSN 6645-00-810-7229
NSN 6135-01-557-9656
NSN 5910-01-422-0380
NSN 5965-01-021-7023
NSN 6135-01-440-9412
NSN 6220-01-348-5510
NSN 5950-00-239-3979
NSN 5950-01-576-5398
NSN 6220-01-218-9214