S-8077A757 1/2"-13 ASME B18.3 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life.
- Enhanced durability and wear resistance from the black oxide finish, which also provides a sleek, non-reflective appearance.
- High-strength performance with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for reliable, heavy-duty fastening.
- Precise and secure thread engagement with a Class 3A thread fit, ensuring tight tolerances and reduced risk of loosening under vibration.
- Easy installation and removal using a standard 5/16" hex drive and a knurled socket head for improved grip and torque application.
- Accurate alignment and spacing provided by the precision shoulder diameter and length, minimizing component misalignment.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety, quality, and environmental responsibility.
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw is engineered to solve critical challenges in demanding industrial environments. The combination of corrosion-resistant 316 stainless steel and a protective black oxide finish ensures long-term reliability in applications exposed to moisture, chemicals, and extreme temperatures. The 1/2"-13 UNC coarse thread and Class 3A thread fit provide superior holding power and vibration resistance, making it ideal for machinery, automotive assemblies, and precision equipment where shoulder screws are used for pivoting, locating, or spacing components. The knurled head and hex drive facilitate quick, secure installation, reducing assembly time and improving operational efficiency in high-stakes manufacturing and engineering projects.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit for high precision, with a shoulder diameter of 5/8" (tolerance: -0.004" to -0.002") and shoulder length of 2 1/4" (tolerance: -0.005" to 0.005"). It conforms to ASME B18.3 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.
