S-97345A404 8-32 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.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
• Precision Class 3A thread fit ensures tight tolerances and secure fastening, minimizing backlash and vibration loosening.
• Enhanced grip and tool engagement from the knurled socket head and 1/8" hex drive, allowing for secure installation and removal.
• Durable wear resistance with a Rockwell B79 hardness, maintaining integrity through repeated use and assembly cycles.
• Broad compatibility with 8-32 UNC coarse threads, facilitating easy integration into standard industrial assemblies.
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, environmentally conscious use.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and assembly jigs where alignment and durability are paramount. The Class 3A fit and UNC coarse thread provide consistent clamping force, reducing the risk of thread stripping in high-vibration environments. Its knurled socket head enhances torque transmission, preventing cam-out during installation with a standard hex key. The corrosion-resistant material ensures longevity in moist or chemical-exposed settings, making it ideal for industrial applications like robotics, conveyor systems, and electronic enclosures. By combining high tensile strength with precise shoulder dimensions, it supports accurate component positioning and load distribution, streamlining maintenance and improving operational reliability.

Specification Summary & Compliance

This shoulder screw features an 8-32 UNC thread with Class 3A fit for precise thread engagement, and shoulder dimensions including a 1/4" diameter with tight tolerances (e.g., -0.004" to -0.002"). Manufactured in accordance with ASME B18.3 specifications, it ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use.