S-97345A947 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 or wet industrial environments.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable, heavy-duty load-bearing applications.
• Precision alignment and smooth rotation enabled by the 3" shoulder with tight diameter and length tolerances.
• Secure, high-precision threading with Class 3A UNC coarse threads for easy assembly and vibration resistance.
• Easy installation and removal using the 3/8" hex socket drive and knurled head for improved grip.
• Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability.
• Environmental and safety compliance with RoHS 3 and REACH, making it suitable for regulated industries.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical alignment and durability challenges in demanding applications. The 1/2"-13 UNC coarse thread and Class 3A fit ensure secure fastening with minimal risk of loosening under vibration, while the 3" shoulder length provides precise spacing and rotational support in machinery, pivoting assemblies, and conveyor systems. The socket head with hex drive allows for easy access in confined spaces, and the knurled texture enhances handling during installation. With high tensile and shear strength, it reliably supports heavy loads in automotive, aerospace, and industrial equipment, reducing maintenance needs and downtime.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC coarse thread with Class 3A fit for high precision. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005". It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.