S-8077A842 1/4"-20 ASME B18.3 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for high-load applications.
- Precise alignment and smooth rotation ensured by the standard shoulder fit and consistent 11/16" shoulder length.
- Enhanced grip and reduced tool slippage from the knurled socket head design with a 5/32" hex drive.
- Reliable, vibration-resistant fastening with a Class 3A thread fit and coarse UNC threads for quick assembly.
- Durable, wear-resistant surface provided by the black oxide finish, adding an extra layer of protection.
- Guaranteed quality and safety compliance meeting ASME B18.3, RoHS 3, and REACH standards for industrial use.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial applications such as machinery assembly, pivoting mechanisms, and precision equipment. The black oxide finish enhances corrosion resistance, while the Class 3A thread fit and UNC coarse threads ensure secure, vibration-resistant connections that withstand dynamic loads. The knurled socket head provides superior torque transmission, reducing the risk of stripping during installation. With a 70,000 psi tensile strength and precise shoulder diameter of 5/16", it offers reliable performance in high-stress environments, making it an ideal choice for B2B procurement in sectors requiring durable, compliant fastening solutions.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with 1/4"-20 UNC coarse threads, ensuring tight tolerances and reliable engagement. The shoulder diameter is maintained at 5/16" with a tolerance of -0.004" to -0.002", and the shoulder length is 11/16" with a tolerance of -0.005" to 0.005" for precise alignment. Manufactured in accordance with ASME B18.3 specifications, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing safety and environmental standards for industrial use.
