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 6650-01-192-7449
NSN 5855-01-222-1242
NSN 5950-01-271-9639
NSN 5910-01-487-1387
NSN 5998-01-575-3718
NSN 6685-00-982-4058
NSN 6610-01-633-8931
NSN 5910-01-573-5278
NSN 5905-01-502-5577
NSN 5945-01-042-2258
NSN 5985-01-647-5978
NSN 5965-01-525-4597