S-94559A525 1/4"-20 x 3/8" Aluminum Oversized-Flange Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Enhanced load distribution with a 0.75" integrated flange, reducing surface pressure and preventing material damage during tightening.
• Superior corrosion resistance and lightweight performance from 6061 aluminum, ideal for applications where weight savings and durability are critical.
• High tensile strength of 40,000 psi ensures reliable, long-lasting fastening in demanding industrial environments.
• Quick and easy installation with a 1/8" hex drive, providing a secure grip for efficient assembly with standard tools.
• Consistent and reliable thread engagement due to the Class 2A fit and coarse 1/4"-20 UNC thread, minimizing cross-threading risks.
• Low-profile, rounded button head design offers a finished appearance and reduces snagging hazards in assembled products.
• Full regulatory compliance with RoHS 3 and REACH, ensuring the screw is safe for use in regulated markets and sensitive applications.

Professional Applications & Engineering Value

This 6061 aluminum flanged rounded head screw is engineered to solve common industrial challenges like component weight reduction without sacrificing strength. The integrated flange acts as a built-in washer, distributing clamp load over a wider area to prevent damage to soft materials—a critical feature in electronics enclosures, automotive trim, and machinery panels. Its coarse 1/4"-20 UNC thread and Class 2A fit enable rapid assembly and high resistance to vibration loosening, while the hex drive ensures high torque application without slippage. The rounded button head provides a smooth, finished look, making it ideal for consumer-facing products where safety and aesthetics are priorities. Manufactured from aluminum, it is perfect for applications requiring a non-magnetic, corrosion-resistant fastener.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with a Class 2A thread fit for standard tolerance and reliable engagement. The dimensions include a 3/8" length, 0.75" flange diameter, and a fully threaded shank. It is manufactured from 6061 aluminum with a hardness of Rockwell B40 and a tensile strength of 40,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(b)-II and REACH (EC 1907/2006), ensuring adherence to environmental and safety regulations for industrial and commercial use.