S-93878A108 4-40 x 3/8" Tapping Screws
Tapping 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 zinc-plated steel construction, ensuring long-term durability in harsh industrial environments.
- High-strength thread forming design creates strong, permanent threads in materials like steel and aluminum without pre-tapping, reducing installation time and costs.
- Effortless installation with Phillips No. 1 drive, providing secure torque transfer and minimizing cam-out risks for consistent fastening.
- Reliable coarse UNC threading offers excellent grip and vibration resistance in diverse materials, from sheet metal to cast iron.
- Versatile material compatibility for use in steel, aluminum, brass, and cast iron, streamlining inventory for multiple applications.
- Full threading along the 3/8" length ensures maximum holding power and uniform stress distribution for secure assemblies.
- Compliance with RoHS 3 and REACH standards guarantees safe, environmentally responsible fasteners for global industrial use.
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel tapping screws are engineered to address common industrial fastening challenges, such as material fatigue and loosening under vibration. The thread forming (SW type) technology displaces material to create precise, strong threads without chips, making them ideal for steel, aluminum, brass, and cast iron applications. The coarse thread design enhances pull-out resistance in softer metals, while the Phillips drive ensures quick, reliable installation in confined spaces. With a zinc-plated surface, they resist corrosion in demanding environments, from machinery assemblies to sheet metal enclosures, reducing maintenance needs and improving operational longevity.
Specification Summary & Compliance
This product adheres to UNC coarse thread standards with a size of 4-40 and full threading for consistent performance. Manufactured from zinc-plated steel, it meets precise dimensional tolerances and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial use across various sectors.
