Sherwood: 1/2"X12 BSW HSS Hexagon Die Nut BS 1127. For use with spanners to clean and repair existing external screw threads. Conform to: ISO 529. MPN: 5036140184633 EAN: 5036140184633 1/2"X12 BSW HSS Hexagon Die Nut Attributes: Dimensions Standard: BS 1127 Hex Width: 1.1in Material: High Speed Steel Thickness: 1/2in Thread Direction: Right Hand Thread Size: 1/2in. x 12 Thread Standard: BSW