S-97345A619 5/16"-18 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with 316 Stainless Steel construction for reliable performance in harsh environments.
• Superior thread engagement through Class 3A fit UNC coarse threads, ensuring precise and secure fastening.
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
• Accurate component alignment provided by the 1/2" shoulder with tight diameter and length tolerances.
• Secure grip and easy installation from the knurled socket head with 3/16" hex drive, reducing slippage.
• Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability.
• Environmental and safety adherence with RoHS 3 and REACH compliance for sustainable and safe use.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and corrosion-induced failure. Its UNC coarse threads and Class 3A fit deliver exceptional thread reliability, minimizing loosening under vibration in industrial applications like robotics and automotive assemblies. The knurled socket head enhances grip during installation, while the precisely machined shoulder ensures accurate positioning of moving parts. Made from corrosion-resistant material, it excels in harsh conditions, reducing maintenance needs and extending service life in high-performance systems.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for high precision, and a shoulder diameter of 3/8" with tolerances from -0.004" to -0.002" and length of 1/2" with -0.005" to 0.005" tolerance. 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 industry-standard reliability.