S-91259A101 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Durability – Made from high-strength alloy steel with Rockwell C32 hardness, ensuring long-lasting performance in demanding industrial environments.
• Superior Corrosion Resistance – Black oxide finish provides reliable protection against rust and wear, extending service life in harsh conditions.
• High Load Capacity – Tensile strength of 140,000 psi and minimum shear strength of 84,000 psi offer reliable fastening for heavy-duty applications.
• Precision Thread Fit – Class 3A UNC coarse threads ensure secure, vibration-resistant connections with easy installation and removal.
• Secure Grip & Easy Drive – Knurled socket head with 1/8" hex drive allows for firm tool engagement and efficient torque application.
• Accurate Shoulder Dimensions – Tight tolerances on shoulder diameter and length (±0.005") enable precise alignment and spacing in assemblies.
• Compliance & Safety Assurance – Meets ASME B18.3 standards and is RoHS 3 & REACH compliant, ensuring environmental and regulatory safety.

Professional Applications & Engineering Value

This alloy steel shoulder screw with a black oxide finish is engineered to address critical industrial challenges, such as misalignment and component wear in machinery. The 10-24 UNC coarse thread and Class 3A fit provide robust, vibration-resistant fastening, ideal for high-stress applications like automotive assemblies, precision equipment, and rotating mechanisms. The knurled socket head enhances grip during installation, reducing slippage and improving efficiency. With its high tensile and shear strength, this screw ensures reliable performance in environments requiring durability and corrosion resistance, making it a trusted choice for engineers and OEMs seeking long-term operational stability.

Specification Summary & Compliance

This shoulder screw features precise Class 3A thread fit with UNC coarse threading and adheres to ASME B18.3 manufacturing specifications. Shoulder dimensions include a diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" for accurate assembly. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.