S-97345A758 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 industrial environments and outdoor applications.
- Enhanced durability and load-bearing capacity from 70,000 psi tensile strength and Rockwell B79 hardness, reducing failure risks.
- Precise alignment and secure pivoting thanks to the 1-1/4" shoulder with tight diameter tolerance for consistent performance.
- Reliable thread engagement with Class 3A fit and coarse UNC thread, ensuring vibration resistance and easy assembly.
- Quick, secure installation using a standard 5/16" hex drive and knurled head for improved grip and torque application.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.
- Versatile application fit with a 3/4" thread length and right-hand thread design, suitable for various machinery and equipment.
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical stress. Its 1/2"-13 UNC coarse thread with Class 3A fit provides excellent vibration resistance and quick assembly in high-load scenarios, from automotive assemblies to precision machinery. The knurled head and hex drive enable secure tool engagement, reducing slippage during installation. With a 1-1/4" shoulder length and tight tolerances, it ensures accurate component positioning, minimizing wear and maintenance needs in industrial fastener systems exposed to moisture, chemicals, or extreme temperatures.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for precise engagement and a shoulder diameter tolerance of -0.004" to -0.002". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety. The coarse UNC thread and standard shoulder fit support reliable performance in regulated industrial applications.
