Sherwood: 1/4"X18 NPT HSS Hexagon Die Nut For use with spanners to clean and repair existing external screw threads. MPN: 5036140185210 EAN: 5036140185210 1/4"X18 NPT HSS Hexagon Die Nut Attributes: Dimensions Standard: ISO 529 Hex Width: 1.10in Material: High Speed Steel Thickness: 1/2in Thread Direction: Right Hand Thread Size: 1/4in. x 18 Thread Standard: NPT