S-97345A785 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and resistance to mechanical failure under stress.
• Precision Class 3A thread fit provides consistent, secure fastening with minimal play, reducing assembly time and improving joint integrity.
• Knurled socket head with 5/16" hex drive offers enhanced grip and easy installation, even in tight spaces or with gloved hands.
• Coarse 1/2"-13 UNC thread allows for quick assembly and disassembly, reducing labor costs in high-volume applications.
• Durable Rockwell B79 hardness maintains dimensional stability and resists wear, ensuring long-term performance in dynamic applications.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations for safe, global use.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges, such as corrosion in aggressive environments and the need for high-strength, precision components. The UNC coarse thread and Class 3A fit ensure rapid, reliable assembly in machinery, automotive, and aerospace applications, minimizing downtime. The knurled socket head enhances torque application, reducing slippage during installation. With a 1 3/8" shoulder length and standard shoulder fit, it provides stable alignment for rotating parts, bushings, or spacers, making it ideal for precision shoulder bolt uses where dimensional accuracy and corrosion resistance are critical for operational efficiency.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a thread diameter of 0.5", thread length of 3/4", and shoulder length of 1 3/8" with tight tolerances (e.g., shoulder diameter tolerance of -0.004" to -0.002"). It adheres to UNC thread standards and Class 3A fit for high accuracy. Manufactured in compliance with ASME B18.3 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring environmental safety and regulatory conformity for industrial fasteners.