S-97832A287 5/16"-18 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 18-8 stainless steel construction, ideal for harsh industrial environments.
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable, heavy-duty applications.
- Precise thread engagement ensured by Class 3A thread fit, reducing the risk of cross-threading and improving assembly reliability.
- Enhanced grip and torque application from the knurled socket head, allowing for secure installation even in oily or gloved conditions.
- Accurate component alignment due to the consistent 3/8" shoulder diameter with tight tolerance, minimizing part movement.
- Long-term durability supported by Rockwell B55 hardness, resisting wear and deformation under load.
- Broad compatibility and safety through compliance with ASME B18.3, RoHS 3, and REACH standards.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address common assembly challenges in precision machinery, automation systems, and rotating equipment. The 5/16"-18 UNC coarse thread and Class 3A thread fit provide quick, secure fastening with reduced risk of stripping, while the knurled socket head ensures positive drive engagement in high-vibration environments. The precisely machined 3/8" shoulder diameter acts as a pivot or spacer, maintaining alignment in linkages, bearings, and gears without additional bushings. Its high tensile and shear strength makes it suitable for demanding applications where load-bearing reliability is critical, enhancing equipment uptime and reducing maintenance needs.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit per UNC standards, with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for precise dimensional control. It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.
