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 5990-01-548-3711
NSN 5915-00-962-0358
NSN 7035-01-483-1200
NSN 2925-01-460-1601
NSN 5965-01-309-4368
NSN 5835-01-508-2528
NSN 5855-00-079-2370
NSN 6220-00-893-2704
NSN 5835-01-602-0311
NSN 6130-01-442-6491
NSN 6135-01-493-2912
NSN 6105-01-145-7809