S-91259A534 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi minimum shear strength, ensuring reliable performance in high-stress applications.
• Superior corrosion resistance and reduced light reflection thanks to the black oxide finish, extending service life in demanding environments.
• Precise and secure assembly with Class 3A thread fit and UNC coarse threads, providing excellent engagement and vibration resistance.
• Enhanced grip and easy installation from the knurled socket head and 1/8" hex drive, allowing for efficient torque application without slippage.
• Consistent dimensional accuracy with tight shoulder diameter and length tolerances, ensuring proper fit and alignment in precision machinery.
• Long-term durability and wear resistance due to Rockwell C32 hardness, maintaining integrity under repeated use.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence for global applications.

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to address critical challenges in industrial settings where precision, strength, and reliability are paramount. The alloy steel construction, combined with a black oxide finish, provides excellent resistance to corrosion and wear, making it ideal for applications in machinery, automotive assemblies, and electronic enclosures exposed to harsh conditions. The socket head with hex drive and knurled texture ensures secure tool engagement, reducing the risk of stripping during high-torque installations. With a Class 3A thread fit and coarse UNC threads, it offers quick assembly and robust vibration resistance, minimizing loosening in dynamic operations. These features make it a trusted component for precision shoulder screw applications, such as pivots, axles, and spacers, where consistent performance and dimensional stability are essential to prevent downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNC thread standards for precise engagement, with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" ensuring accurate alignment. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for safe, global industrial use.