S-91259A510 10-24 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with alloy steel construction and 140,000 psi tensile strength for reliable performance in demanding applications.
• Superior corrosion resistance provided by the black oxide finish, extending the screw's service life in various industrial environments.
• Precise and secure fit ensured by the Class 3A thread fit, minimizing the risk of loosening and improving assembly integrity.
• Easy and secure installation with the knurled socket head and hex drive, allowing for better grip and torque application during assembly.
• Accurate positioning and alignment due to the precisely machined shoulder with tight diameter and length tolerances.
• High hardness for wear resistance with Rockwell C32 rating, maintaining dimensional stability under mechanical stress.
• Broad industry compliance meeting ASME B18.3 standards and environmental regulations like RoHS 3 and REACH for global use.

Professional Applications & Engineering Value

This 10-24 UNC thread shoulder screw is engineered to address critical challenges in precision assemblies, such as in machinery, automotive, and aerospace components. The alloy steel material, combined with a black oxide finish, offers excellent resistance to corrosion and wear, reducing maintenance needs in harsh conditions. Its Class 3A thread fit and precise shoulder dimensions ensure minimal backlash and reliable alignment in rotating parts or pivoting mechanisms, preventing misalignment and enhancing operational accuracy. The knurled head and hex drive facilitate secure installation, even in confined spaces, making it ideal for applications requiring high-strength fastening with consistent performance. By integrating these features, this shoulder screw delivers long-term reliability and efficiency in demanding industrial settings.

Specification Summary & Compliance

This shoulder screw features a 10-24 UNC coarse thread with Class 3A fit for high precision, and shoulder dimensions including a diameter of 1/4" (tolerance: -0.004" to -0.002") and length of 1 7/8" (tolerance: -0.005" to 0.005"). It complies with ASME B18.3 specifications, RoHS 3 (2015/863/EU), and REACH (EC 1907/2006) standards, ensuring quality and environmental safety.