S-90909A527 1/4"-20 x 1/2" Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel and passivated finish, ideal for harsh environments and extended service life.
• High-strength reliability with 70,000 psi tensile strength and Rockwell B70 hardness, ensuring dependable performance under load.
• Precise, secure fastening provided by Class 3A UNC coarse threads, offering excellent thread engagement and vibration resistance.
• Efficient installation and removal with the 5/32" hex drive, allowing for high torque application and reduced tool slippage.
• Enhanced load distribution and stability from the wide button head and 0.56" flange diameter, minimizing surface damage and pull-through.
• Full-threaded design for maximum grip length and holding power along the entire 1/2" shank.
• Compliance with environmental regulations, being RoHS 3 and REACH compliant for safe use in regulated industries.

Professional Applications & Engineering Value

This 1/4"-20 UNC Class 3A Rounded Head Screw is engineered to solve critical fastening challenges in demanding industrial settings. Constructed from 316 Stainless Steel with a passivated finish, it provides exceptional resistance to corrosion, chemicals, and high-moisture conditions, making it ideal for marine, chemical processing, and food industry applications. The flanged hex drive design ensures easy installation with standard tools while the wide button head and flange distribute clamping force effectively, preventing damage to soft materials and reducing the need for washers. With a coarse thread and fully threaded body, it offers quick assembly and reliable holding power in a variety of materials, from metal to plastic, enhancing productivity and reducing maintenance downtime in industrial screw applications.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC thread with Class 3A fit for high precision and strength. It is fully manufactured to standard specifications, including a right-hand thread direction and coarse thread spacing. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.