Qualfast: 1/2 BSW X 4.1/2 Skt Head Cap Scew (GR-12.9) High Grade Alloy Steel to Grade 12.9. Suitable for all high tensile applications. Maximum operating temperature (unplated): 300C. MPN: 07200.127.110 EAN: 5036140305793 1/2 BSW X 4.1/2 Skt Head Cap Scew (GR-12.9) Attributes: Box Quantity: Driver Head Size: 3/8 Driving Features: Hexagon Socket Grade: 12.9 Head Depth: 0.500in Head Diameter: 0.750in Head Shape: Cylindrical Length: 4.1/2in Material: Steel Standards Met: DIN 912 Surface Treatment: Plain Thread Direction: Right Hand Thread Size: 1/2in.