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 6645-01-383-6514
NSN 5905-01-213-7617
NSN 5998-01-077-5000
NSN 5998-01-163-7141
NSN 5905-00-081-9240
NSN 6620-01-541-4465
NSN 5895-00-772-9386
NSN 6220-01-401-5337
NSN 5925-00-990-2442
NSN 5930-01-555-5215
NSN 5905-01-537-3185
NSN 2925-01-109-3684