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 6610-01-196-9861
NSN 6105-00-471-5545
NSN 5930-01-216-1456
NSN 5930-01-065-0890
NSN 6320-01-562-1599
NSN 5915-00-609-6768
NSN 6135-00-862-5736
NSN 6685-01-120-7633
NSN 6645-01-338-1423
NSN 6220-01-390-6357
NSN 6135-00-998-5884
NSN 5990-01-378-7349