S-91223A217 1/4"-20 x 1/2" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 Stainless Steel construction, ideal for harsh or marine environments.
• Exceptional strength and durability with a 70,000 PSI tensile strength and Rockwell B70 hardness for reliable, long-lasting fastening.
• Space-saving ultra-low profile head allows for use in tight or flush-mount applications where clearance is limited.
• Precise and reliable installation ensured by the Class 2A thread fit, providing consistent engagement and reducing the risk of cross-threading.
• Secure, slip-resistant drive with the 1/8" hex socket, offering excellent torque transfer and tool engagement.
• Versatile coarse (UNC) threading for faster installation and improved performance in a wider range of materials.
• Global compliance and environmental safety with full adherence to RoHS 3 and REACH regulations.

Professional Applications & Engineering Value

This 316 Stainless Steel Socket Head Cap Screw is engineered to solve critical challenges in demanding industrial environments. Its ultra-low profile head is a key design feature, enabling installation in confined spaces where standard cap screws cannot fit, such as in precision machinery, enclosures, and automotive assemblies. The coarse UNC thread and Class 2A fit ensure rapid, reliable assembly with reduced risk of stripping, while the fully threaded design provides consistent clamping force along the entire 1/2" length. Manufactured from 316 Stainless Steel, it delivers outstanding resistance to corrosion from chemicals, saltwater, and other aggressive agents, making it a robust and durable fastener for applications in chemical processing, marine equipment, and food-grade machinery where reliability and material integrity are non-negotiable.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC thread with a Class 2A thread fit for standard engineering tolerances. It is manufactured to precise dimensional specifications, including a head diameter tolerance of -0.005" to 0.005". The product is fully compliant with major environmental and safety regulations, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006).