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Torx Bolts

Also known as star, 6 lobe, and hexalobular internal. Torx bolts and screws are commonly found on cars, motorcycles, bicycle brake systems, hard disk drives, computer systems and consumer electronics and are becoming increasingly popular. Once, they were typically used in applications requiring tamper resistance; as drivers became more common, specific tamper-resistant variants were developed. The Torx design allows for a higher torque to be exerted than a similarly sized conventional hex socket head.
Fastener Material Key
A2 Stainless Steel - Also known as grade 304 or 18/8. A general purpose grade of stainless steel.
A4 Stainless Steel - Also known as grade 316 or 18/8/3. A higher corrosion resistant, marine grade of stainless steel.
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.