S-90273A108 4-40 x 3/8" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips Flat 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 zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments.
- High tensile strength of 60000 psi provides dependable holding power for demanding applications, reducing the risk of fastener failure.
- Rockwell B70 hardness offers excellent durability and resistance to wear, extending the service life of your assemblies.
- Class 2A thread fit ensures easy assembly and consistent performance with standard UNC coarse threads for quick installation.
- Fully threaded design allows for maximum grip and uniform load distribution along the entire length.
- 82° countersink angle and flat head profile enable a flush finish, minimizing protrusion and improving aesthetics in finished products.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, supporting sustainable procurement.
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel flat head screws are engineered to address common industrial fastening challenges, such as vibration loosening and corrosion. The coarse thread design facilitates quick installation in various materials, while the Phillips drive ensures secure torque application without slippage. Ideal for electronics, machinery, and automotive assemblies, these screws provide a reliable, fully threaded connection that maintains integrity under stress. The zinc plating adds a protective layer, making them suitable for environments exposed to moisture or chemicals, thereby reducing maintenance needs and downtime in industrial applications.
Specification Summary & Compliance
This product features precise Class 2A thread fit per UNC standards, ensuring dimensional accuracy and compatibility. It meets ASME B18.6.3 specifications for manufacturing consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances for safe use in global markets.
