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 5915-01-423-8561
NSN 5960-01-295-8924
NSN 5855-01-281-6689
NSN 5925-01-421-4473
NSN 6105-01-250-1641
NSN 5935-01-213-8447
NSN 5905-00-597-5069
NSN 6685-01-395-8498
NSN 6130-01-406-4970
NSN 5985-00-753-1397
NSN 5990-01-057-4191
NSN 7035-00-111-4389