S-91770A535 1/4"-20 x 3/8" 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 and outdoor applications.
- Enhanced load distribution through the wide truss head design, reducing surface pressure and preventing material damage during installation.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration, minimizing failure risks.
- Optimized drive engagement with Phillips No. 3 drive style, providing secure torque transfer and reducing cam-out during assembly.
- Precise Class 2A thread fit with UNC coarse threading for quick installation and consistent fastening in various materials.
- Full threading along the 3/8" length allows maximum grip and adjustment flexibility in tight spaces.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees industry-standard quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this 1/4-20 UNC truss head screw addresses critical challenges in assembly and durability. The passivated 18-8 stainless steel material provides excellent resistance to rust and chemical exposure, making it suitable for machinery, automotive, and marine environments where corrosion is a concern. The wide truss head design offers a larger bearing surface, distributing clamp load effectively to prevent sheet metal distortion or plastic cracking. Combined with coarse UNC threading and Phillips No. 3 drive, it ensures rapid installation and secure fastening in wood, metal, or composite substrates, reducing assembly time and maintenance needs in high-vibration settings.
Specification Summary & Compliance
This screw maintains precise Class 2A thread fit per UNC standards, with a diameter of 0.25" and coarse thread spacing for reliable engagement. Manufacturing adheres to ASME B18.6.3 specifications, ensuring dimensional accuracy and performance consistency. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting sustainable procurement practices.
