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 6645-01-541-5696
NSN 6645-01-512-2260
NSN 6610-01-011-4972
NSN 5925-01-272-0894
NSN 4140-01-351-3892
NSN 6685-00-988-5222
NSN 6240-01-435-6505
NSN 6135-01-027-7543
NSN 6135-00-231-7257
NSN 6620-01-176-6956
NSN 5960-01-444-2205
NSN 5998-00-795-7644