S-91355A176 1/4"-20 x 1/4" Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide coating, ideal for industrial environments requiring durability.
• Superior tensile strength of 120,000 psi ensures reliable performance under high-stress applications without failure.
• Class 3A thread fit provides precise, tight fastening with reduced risk of loosening in vibration-prone settings.
• Wide rounded button head design offers a low-profile, aesthetically pleasing finish while distributing clamping force evenly.
• 5/32" hex drive allows for easy installation and removal with standard tools, improving assembly efficiency.
• Fully threaded shank enables consistent grip along the entire length, enhancing load distribution in various materials.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global industry standards.

Professional Applications & Engineering Value

This 1/4"-20 UNC rounded head screw is engineered for demanding industrial applications where strength and reliability are critical. Constructed from black-oxide alloy steel, it resists rust and wear in harsh conditions, such as machinery assembly, automotive components, and construction projects. The coarse UNC thread and Class 3A fit ensure secure fastening in materials like metal and plastic, reducing the risk of stripping or vibration-induced loosening. With a flange design and fully threaded body, it provides uniform pressure distribution, making it ideal for high-stress environments. This screw addresses common issues like corrosion and installation inefficiency, offering a durable solution that enhances equipment longevity and reduces maintenance needs.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy and reliable performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured with a right-hand thread direction and coarse thread spacing, it is designed for efficient assembly in industrial settings, supporting consistent quality and safety in applications requiring high tensile strength and hardness (Rockwell C32).