S-8077A325 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections in critical assemblies
• Knurled hex socket head provides excellent grip and prevents tool slippage during installation
• Standard shoulder fit maintains accurate alignment and acts as a bearing surface in rotating applications
• Compliance with ASME B18.3 ensures dimensional consistency and interchangeability in professional settings
• RoHS and REACH compliance meets environmental regulations for global industrial supply chains

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to solve alignment and wear challenges in precision machinery. The 316 stainless steel material combined with black oxide finish provides exceptional resistance to chemicals, moisture, and high temperatures, making it suitable for automotive assemblies, industrial equipment, and marine applications. The knurled hex socket head ensures secure tool engagement, reducing installation time and preventing damage in high-torque scenarios. With a Class 3A thread fit and controlled shoulder tolerances, it maintains precise component positioning, minimizes backlash in moving parts, and extends service life in demanding precision assembly environments.

Specification Summary & Compliance

This shoulder screw features UNC coarse threads with Class 3A thread fit for tight tolerances, a shoulder diameter tolerance of -0.004" to -0.002", and shoulder length tolerance of -0.005" to 0.005". It conforms to ASME B18.3 dimensional standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for regulated industrial and export markets.