Qualfast: 1/2 BSF X 1. 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. High Grade Alloy Steel to BS EN ISO 898/1 Grade 12.9. Suitable for all high tensile applications. Maximum operating temperature (unplated): 300C. Dimensions to BS 2470 MPN: QFT6010574C EAN: 5036140304888 1/2 BSF X 1. 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: 1in Material: Alloy Steel Standards Met: DIN 912 Surface Treatment: Plain Thread Direction: Right Hand Thread Size: 1/2in.