Used on h-3 helicopter
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.)
Classification: Nuts of iron or steel
NSN 7035-01-141-8076
NSN 2925-00-149-0760
NSN 6320-01-531-4997
NSN 5915-01-386-0001
NSN 5945-01-055-6968
NSN 5975-01-052-5059
NSN 5910-00-805-6639
NSN 6110-00-636-1234
NSN 5998-00-944-4706
NSN 5910-01-429-0111
NSN 5996-01-077-9181
NSN 6240-00-824-4678