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What is an ISO 14579 A4-70 Torx Socket Head Cap Screw?
ISO 14579 socket head cap screws are metric machine screws featuring a cylindrical head with an internal Torx (Hexalobular) drive. The Torx recess provides excellent torque transfer while significantly reducing cam-out and drive wear compared to traditional drive systems, making these screws ideal for both manual and automated assembly. ISO 14579 screws are commonly installed into tapped holes or used with metric nuts in applications requiring a strong, precision fastener. They are also known as Torx socket head cap screws, hexalobular socket head screws, Torx machine screws, and internal Torx cap screws.
What material is an ISO 14579 A4-70 screw made from?
ISO 14579 screws are manufactured from A4-70 stainless steel (SAE Type 316 stainless steel), commonly referred to as marine-grade stainless steel. Per DIN EN ISO 3506, A4-70 stainless steel has a minimum tensile strength of 700 N/mm² while providing outstanding resistance to corrosion, saltwater, chlorides, and many chemicals. The natural stainless finish offers long-term durability and a clean, professional appearance, making these screws well suited for demanding indoor and outdoor environments.
Why choose an A4-70 ISO 14579 Torx socket head screw?
A4-70 stainless steel combines excellent corrosion resistance with dependable mechanical strength, making it the preferred choice for applications exposed to moisture, marine environments, or corrosive chemicals. The Torx (Hexalobular) drive provides superior torque transmission, minimizes cam-out, and reduces tool wear, resulting in faster, more consistent installation. These screws are ideal for applications requiring both long service life and reliable fastening performance.
Where are ISO 14579 A4-70 Torx socket head screws commonly used?
ISO 14579 A4-70 Torx socket head cap screws are widely used in marine equipment, offshore installations, food processing machinery, pharmaceutical equipment, chemical processing systems, laboratory instruments, renewable energy equipment, automation systems, electrical enclosures, industrial machinery, and outdoor mechanical assemblies. Their combination of marine-grade corrosion resistance, high-quality Torx drive, and precision socket head design makes them an excellent choice for OEM manufacturing, maintenance, and engineering applications where durability, corrosion resistance, and dependable torque control are essential.
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