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Home   /   A4 Stainless Steel Coach Bolts Metric

A4 Stainless Steel Coach Bolts Metric

Coach bolts, also referred to as carriage bolts have a square section beneath their domed head. As there is no drive on the top surface of the bolt, the corners of the square neck shape dig into wood and stop the bolt from spinning as the nut is tightened. The wide head stops the head from being pulled through the clearance hole and spreads the load against the wood.
Fastener Material Key
A2
A2 Stainless Steel- Also known as grade 304 or 18/8. A general purpose grade of stainless steel.
A4
A4 Stainless Steel - Also known as grade 316 or 18/8/3. A higher corrosion resistant, marine grade of stainless steel.
Brass
Brass - Offers an attractive, corrosion resistant finish.
BZP
Bright Zinc Plated (BZP) Steel - Non-stainless standard steel grade offering a basic level of corrosion resistance.
BZP-8.8
Bright Zinc Plated (BZP) Class 8 High Tensile Steel - The general purpose high tensile grade for screws and bolts, with a basic level of corrosion resistance.

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