S-91770A674 5/16"-18 x 3" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws
Stainless Steel Truss 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
- Enhanced load distribution from the wide truss head design, reducing surface damage and improving joint integrity
- High tensile strength of 70,000 psi ensures reliable performance under heavy mechanical stress
- Consistent driving torque with Phillips No. 4 drive, minimizing cam-out and speeding up assembly
- Precise thread engagement thanks to Class 2A fit UNC coarse threads, providing secure fastening in various materials
- Full threading along the 3" length offers maximum adjustability and holding power in deep applications
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this 5/16"-18 UNC x 3" rounded truss head screw delivers exceptional durability and reliability. The passivated 18-8 stainless steel material provides excellent resistance to rust and chemicals, making it suitable for outdoor, marine, and chemical processing equipment. Its wide truss head distributes clamping force over a larger area, preventing surface damage on softer materials and reducing the risk of loosening under vibration. With a coarse thread design and Class 2A fit, it ensures quick installation and secure fastening in wood, metal, and plastic assemblies. The fully threaded shank and Phillips No. 4 drive streamline assembly lines, cutting downtime and enhancing productivity in automotive, construction, and machinery applications.
Specification Summary & Compliance
This screw adheres to inch system measurements with a 5/16"-18 UNC coarse thread and Class 2A thread fit for precise dimensional accuracy. It meets ASME B18.6.3 specifications for dimensional and mechanical requirements, ensuring consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for industrial use.
