Sherwood: 1/2"X20 UNF HSS Hexagon Die Nut BS 1127. For use with spanners to clean and repair existing external screw threads. MPN: 5036140184411 EAN: 5036140184411 1/2"X20 UNF HSS Hexagon Die Nut Attributes: Dimensions Standard: BS 1127 Hex Width: 1.10in Material: High Speed Steel Thickness: 1/2in Thread Direction: Right Hand Thread Size: 1/2in. x 20 Thread Standard: UNF