S-8077A326 3/8"-16 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 chemical exposure.
• Enhanced durability and strength offering 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in high-stress applications.
• Precise alignment and smooth rotation provided by the standard shoulder fit and Class 3A thread, reducing wear and ensuring consistent operation.
• Secure, non-slip grip from the knurled socket head, allowing for easy installation and removal with a hex drive tool.
• Long-lasting surface protection with black oxide finish, which adds corrosion resistance and a professional appearance.
• Broad compatibility and reliability through UNC coarse threads and compliance with ASME B18.3 standards, ensuring interchangeability and safety.
• Environmental and regulatory safety with RoHS 3 and REACH compliance, making it suitable for global industrial and mechanical uses.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The UNC coarse threads and Class 3A fit provide excellent holding power and ease of assembly in machinery, automotive, and aerospace components. The black oxide finish enhances corrosion resistance, extending service life in humid or corrosive environments. With a knurled socket head and hex drive, it ensures secure tool engagement, reducing slippage during high-torque applications. Ideal for precision assemblies like bearings, linkages, and pivots, this screw delivers consistent performance, minimizing downtime and maintenance costs in demanding industrial applications.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a thread size of 3/8"-16 UNC with Class 3A thread fit for tight tolerances. The shoulder diameter and length adhere to standard fits with specified tolerances (e.g., shoulder diameter: -0.004" to -0.002"). It meets ASME B18.3 specifications for dimensional accuracy and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it is free from hazardous substances and suitable for various regulated industries.