S-8077A753 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 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 loads.
• Precise alignment and smooth rotation ensured by the 6 1/2" shoulder with standard fit and tight diameter tolerance.
• Enhanced grip and easy assembly provided by the knurled socket head with 5/16" hex drive, reducing tool slippage.
• Accurate and secure fastening with Class 3A thread fit and coarse 1/2"-13 UNC thread, minimizing the risk of cross-threading.
• Improved wear resistance and reduced glare from the black oxide finish, suitable for various mechanical applications.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment and corrosion-induced failure. The black oxide finish enhances durability while reducing friction, making it ideal for machinery, automotive assemblies, and precision equipment where corrosion resistance is paramount. The Class 3A thread fit and coarse UNC thread provide reliable engagement in high-vibration environments, preventing loosening. With a robust 70,000 psi tensile strength and precise shoulder diameter tolerances, it ensures stable rotational movement and longevity in demanding industrial fasteners applications, reducing maintenance downtime and improving operational efficiency.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with 1/2"-13 UNC coarse threads, ensuring high precision and interchangeability. Dimensions include a shoulder diameter of 5/8" with a tolerance of -0.004" to -0.002" and a shoulder length of 6 1/2" with a tolerance of -0.005" to 0.005". It complies with ASME B18.3 specifications for dimensional accuracy and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety standards for industrial use.