S-91802A103 4-40 x 1/8" ASME B18.6.3 Stainless Steel Phillips Oval Head Screws
Stainless Steel Phillips Oval Head 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, ensuring long-term reliability in harsh environments.
- Exceptional tensile strength of 80,000 psi provides secure, vibration-resistant fastening for demanding applications.
- Class 2A thread fit guarantees precise, easy assembly and consistent performance with standard UNC nuts and tapped holes.
- Fully threaded design maximizes grip and load distribution across the entire 1/8" length.
- Undercut oval head with Phillips No. 1 drive offers a flush, low-profile finish and reliable torque transmission without cam-out.
- Rockwell B80 hardness ensures high durability and resistance to wear during installation and use.
- Compliance with ASME B18.6.3, RoHS 3, and REACH assures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 4-40 UNC Oval Head Phillips Machine Screw is engineered to address critical needs in precision assembly and industrial fastening. The passivated 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it ideal for applications in electronics, automotive, and marine environments where moisture and chemicals are present. The coarse UNC thread and Class 2A fit ensure quick, secure installation with reduced risk of cross-threading, while the fully threaded design enhances holding power in thin materials. The oval head with undercut profile sits flush against surfaces, minimizing protrusion and improving aesthetics in finished products. With a high tensile strength of 80,000 psi, this screw reliably withstands dynamic loads and vibrations, reducing maintenance needs and downtime in machinery and equipment.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threading with a diameter of 0.112" and length of 1/8". It is manufactured in accordance with ASME B18.6.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and sustainability in industrial use.
