Sirius 12.9 Grade Socket Head Cap Screws BSW

The Sirius 12.9 Grade Socket Head Cap Screws in BSW (British Standard Whitworth) thread form are engineered for high-strength fastening applications where reliability and precision are paramount. Manufactured to Grade 12.9 — the highest standard tensile strength classification for metric and imperial fasteners — these screws deliver exceptional clamping force and resistance to fatigue, making them the preferred choice for demanding industrial, engineering, and mechanical environments.

The cylindrical socket head design allows for flush or recessed installation using a hex key (Allen key), ideal where space is restricted or a clean finish is required. Available in BSW sizes ranging from 1/2 BSW to 3/4 BSW, with packs sized to suit both project and production requirements.

Features and Benefits:
• Grade 12.9 high-tensile alloy steel construction for maximum load-bearing strength
• BSW (British Standard Whitworth) thread form for compatibility with imperial applications
• Socket head cap design enables installation in confined spaces with a hex key
• Consistent thread quality for reliable engagement and clamping performance
• Suitable for heavy-duty industrial, mechanical, and engineering applications
• Available in convenient pack quantities to suit trade and project needs