S-91772A656 5/16"-18 x 6" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments.
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term performance.
- Secure and efficient installation using the Phillips No. 4 drive, designed to prevent cam-out during high-torque applications.
- Optimized thread engagement with UNC coarse threading and Class 2A fit, ensuring consistent clamping force and vibration resistance.
- Versatile partial threading on a 6-inch length provides flexibility for applications requiring both gripping and unthreaded shank benefits.
- Broad regulatory compliance meets ASME B18.6.3, RoHS 3, and REACH standards, guaranteeing safety and environmental responsibility.
- Durable rounded pan head design combines a low-profile aesthetic with a larger bearing surface for secure fastening.
Professional Applications & Engineering Value
Engineered for demanding environments, these passivated 18-8 stainless steel rounded head screws deliver reliable performance in industrial machinery, construction, and marine applications. The UNC coarse thread and Class 2A thread fit provide excellent resistance to loosening under vibration, a common challenge in dynamic assemblies. The partial threading allows the unthreaded shank to act as a precision pilot, reducing stress concentration and improving joint integrity. With a Phillips drive for efficient installation and high tensile strength, these screws are a robust solution for heavy-duty fastening where corrosion resistance and mechanical durability are critical.
Specification Summary & Compliance
This screw adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse thread specification (5/16"-18). Manufacturing and quality are governed by ASME B18.6.3. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial and commercial uses.
