S-8077A745 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 and Black Oxide finish, ideal for harsh industrial environments.
- Exceptional load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in heavy-duty applications.
- Precise alignment and smooth rotation thanks to the 7" shoulder length with tight tolerances, reducing wear on mating components.
- Secure, vibration-resistant fastening with Class 3A thread fit and coarse UNC threads for quick assembly and stable connections.
- Easy installation and removal using a standard hex drive and knurled head for improved grip and torque application.
- Long-term durability ensured by Rockwell B79 hardness and compliance with ASME B18.3 standards.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical challenges in industrial machinery, automation systems, and precision equipment. The 316 Stainless Steel material and Black Oxide finish provide excellent resistance to corrosion and oxidation, extending service life in demanding conditions. The 7" shoulder length with minimal tolerances ensures accurate component alignment, reducing misalignment and friction in rotating assemblies. With a coarse UNC thread and Class 3A fit, it offers rapid installation and high clamping force, while the socket head design and knurled texture facilitate easy handling in confined spaces. Ideal for applications requiring robust shear strength and reliable performance, this fastener minimizes downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for precise thread engagement, and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005" ensuring consistent performance. It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing safety and environmental standards.
