Thomas Smith Fasteners: 1/4 BSW X 1 Hex Head Set Gade-R BSW Thread BS1083 Grade R - Self-Colour High grade Alloy Steel to BS EN ISO 898 Grade 8.8. Suitable for all high tension applications. DIN 933. MPN: CTL6310815S EAN: 1/4 BSW X 1 Hex Head Set Gade-R Attributes: Box Quantity: Driving Features: Hexagon Grade: 8.8 Head Shape: Hexagon Head Length: 1in Material: Steel Surface Treatment: Plain Thread Direction: Right Hand Thread Size: 1/4