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 5999-01-260-4540
NSN 5930-01-574-2563
NSN 6610-00-735-2888
NSN 6645-01-624-3467
NSN 5910-01-622-1952
NSN 6220-01-285-5694
NSN 5905-01-156-1517
NSN 6240-01-362-2467
NSN 5975-01-414-8538
NSN 5985-01-056-3011
NSN 6240-01-231-9243
NSN 6320-01-160-0416