8.8 - Black Oxide - Hexagon socket cap screws
Grade 8.8 Black Oxide Socket Cap Screws are the standard high-tensile fastener for modern machinery manufacturing. Combining a robust tensile strength of 800 N/mm² with a sleek, matte black finish, these screws are designed for applications where strength and aesthetics are equally important. The plain (non-knurled) cylindrical head ensures a smooth fit into counter-bored holes, making them ideal for automotive engines, tooling fixtures, and industrial equipment requiring a clean, flush profile.
- High Tensile Strength: Manufactured to Grade 8.8 specifications, providing reliable structural integrity for heavy-duty clamping.
- Black Oxide Finish: A chemical conversion coating that offers mild corrosion resistance (when oiled) and a non-reflective appearance.
- Plain Head Design: Features a smooth cylindrical head without knurling, preferred for precise engineering and automated assembly.
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