S-90807A144 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 140,000 psi tensile strength, this shoulder screw withstands high-stress applications without failure, ensuring long-term reliability in demanding environments.
• Superior Corrosion Resistance – The black oxide finish provides a durable protective layer, reducing rust and wear in harsh industrial settings.
• Precision Thread Fit – Class 3A thread fit offers tighter tolerances for secure, vibration-resistant fastening, minimizing loosening in dynamic assemblies.
• Enhanced Grip and Handling – Knurled head texture improves manual grip during installation, while the standard socket head profile allows for easy hex drive engagement.
• High Material Hardness – Rockwell C32 hardness ensures the screw maintains its shape and thread integrity under repeated use and high loads.
• Accurate Shoulder Dimensions – Controlled shoulder diameter and length tolerances provide consistent alignment and spacing in precision machinery and fixtures.
• Compliance with Environmental Standards – RoHS 3 and REACH compliance guarantees safe, sustainable use without hazardous substances, meeting global regulatory requirements.

Professional Applications & Engineering Value

This 1/2"-13 UNC shoulder screw is engineered to address critical challenges in industrial assembly, such as misalignment and component wear. Made from alloy steel with a black oxide finish, it resists corrosion and extends service life in environments exposed to moisture or chemicals. The coarse UNC thread and Class 3A fit ensure quick, secure installation with high resistance to vibration, making it ideal for precision applications like machinery mounts, pivoting joints, and automation equipment. The knurled head enhances handling, while the robust socket head design allows for efficient torque application with a standard 1/4" hex drive, reducing installation time and improving workflow efficiency in B2B settings.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", ensuring consistent performance in precision applications. It adheres to UNC thread standards with a Class 3A thread fit for superior accuracy. Manufactured from high-strength alloy steel, it meets industry specifications for hardness and tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally responsible industrial use.