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 6135-01-483-5269
NSN 6105-01-167-8921
NSN 5895-01-167-9721
NSN 6110-01-212-4167
NSN 5910-00-059-3640
NSN 5996-01-536-6982
NSN 5998-01-283-1732
NSN 5855-01-156-0417
NSN 6645-01-329-9591
NSN 5910-01-242-5978
NSN 6145-01-606-2172
NSN 5915-01-111-0706