S-94792A331 4-40 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 316 Stainless Steel construction and passivated finish, ideal for harsh environments and extended service life
- Exceptional mechanical strength offering 100,000 psi tensile strength and Rockwell B100 hardness for reliable, high-stress fastening
- Enhanced stability and load distribution from the wide rounded truss head design, reducing surface damage and pull-through
- Efficient installation with No. 1 Phillips drive and coarse UNC threads, ensuring quick, secure engagement in various materials
- Precise thread fit with Class 2A tolerance for consistent performance and reduced risk of cross-threading
- Full threading along the 3/8" length provides maximum grip and adjustment flexibility in assembly applications
- Compliance with industry standards including ASME B18.6.3, RoHS 3, and REACH, ensuring safety and regulatory adherence
Professional Applications & Engineering Value
This 4-40 UNC Rounded Truss Head Screw in 316 Stainless Steel is engineered to address critical challenges in industrial and marine settings where corrosion resistance and structural integrity are paramount. The passivated finish enhances durability against chemicals and moisture, while the wide truss head profile distributes clamping force effectively, minimizing material stress and vibration loosening. With a coarse thread and Class 2A fit, it ensures rapid, reliable fastening in plastics, sheet metal, and electronic enclosures, reducing assembly time and maintenance costs. Ideal for applications in chemical processing, offshore equipment, and food machinery, this screw delivers long-term performance under demanding conditions, supported by full compliance with ASME B18.6.3 and environmental regulations.
Specification Summary & Compliance
This screw features precise 4-40 UNC coarse threads with Class 2A thread fit for consistent engagement and tolerance. It is manufactured in accordance with ASME B18.6.3 specifications, ensuring dimensional accuracy and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting stringent environmental and safety standards for industrial use.
