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 6110-01-529-8817
NSN 6320-01-513-9166
NSN 5975-01-070-5096
NSN 6610-01-506-6151
NSN 7035-01-107-2811
NSN 5975-01-281-7692
NSN 5996-00-106-2835
NSN 5855-01-470-8247
NSN 5999-00-619-4566
NSN 5915-00-104-3119
NSN 5950-01-339-2799
NSN 6110-01-481-4480