Sirius 12.9 Grade Socket Head Cap Screws

The Sirius 12.9 Grade Socket Head Cap Screws are high-strength fasteners engineered for demanding engineering, manufacturing, and industrial applications where exceptional tensile strength and reliable clamping performance are essential. Manufactured from Grade 12.9 alloy steel with a durable black finish, these screws are built for heavy-duty assemblies requiring secure, high-torque fastening.

Featuring a precision hex socket drive, they allow high tightening torque whilst reducing the risk of cam-out, and are compatible with hex keys and hex bit sockets. Screws up to 40mm in length are fully threaded for maximum thread engagement; those over 40mm are partially threaded for improved shear strength.

Available in diameters from M2 to M36 and lengths from 5mm to 300mm, these screws suit machinery assembly, automotive repairs, fabrication, maintenance, and equipment manufacture.

Features and Benefits:
• Grade 12.9 alloy steel for exceptional tensile strength
• Durable black finish for a professional appearance
• Precision hex socket drive minimises cam-out risk
• Compatible with hex keys and hex bit sockets
• Fully threaded up to 40mm for maximum thread engagement
• Partially threaded over 40mm for improved shear strength
• Suitable for professional engineering and industrial use
• Precision manufactured for reliable performance