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 7035-01-386-5722
NSN 6610-01-033-0139
NSN 6645-01-589-8406
NSN 6110-01-406-2934
NSN 5910-01-424-9952
NSN 6610-01-010-4516
NSN 6320-00-110-8005
NSN 6240-01-252-8850
NSN 5835-00-185-4919
NSN 5930-01-026-0016
NSN 5920-01-514-6841
NSN 6105-00-281-3928