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 6220-00-738-0815
NSN 6220-00-144-8043
NSN 5975-01-332-7833
NSN 6240-01-391-0399
NSN 5915-01-032-3004
NSN 6145-01-541-5422
NSN 5905-01-027-3717
NSN 6320-00-116-3658
NSN 6620-00-740-3699
NSN 6645-00-103-2517
NSN 6240-01-220-6066
NSN 6220-00-724-9986