S-93140A709 4-40 x 1/2" ASME B18.6.3 Plastic Slotted Flat Head Screws
Plastic Slotted 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
- Exceptional clarity and chemical resistance from clear polycarbonate material, ideal for applications requiring visual inspection or exposure to harsh environments.
- Precise Class 2A thread fit ensures reliable engagement and consistent performance in assembly, reducing the risk of cross-threading.
- Broad temperature tolerance from -40° to 210° F maintains integrity and dimensional stability in fluctuating thermal conditions.
- Standard 82° countersink angle allows for a flush, low-profile finish that minimizes protrusion and improves safety.
- Right-hand coarse UNC threading provides quick and secure fastening, suitable for a wide range of materials and industrial uses.
- Full compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to strict mechanical and environmental safety standards.
- Slotted flat head design offers straightforward installation with common tools, streamlining maintenance and assembly processes.
Professional Applications & Engineering Value
Engineered for precision, this 4-40 UNC flat head slotted screw in clear polycarbonate plastic addresses critical needs in electronics, medical devices, and optical assemblies where non-conductivity, corrosion resistance, and transparency are paramount. The fully threaded design and coarse thread spacing enhance grip strength in plastic or soft materials, preventing stripping. Its ability to withstand temperatures from -40° to 210° F ensures reliability in environments with thermal cycling, while the 82° countersink angle provides a seamless fit that reduces snagging and improves aesthetic appeal. Ideal for industrial and commercial applications, this screw combines durability with regulatory compliance to support efficient, long-lasting fastening solutions.
Specification Summary & Compliance
This screw features a 1/2" length with UNC coarse threads and a Class 2A thread fit for consistent dimensional accuracy. It meets ASME B18.6.3 specifications for mechanical performance and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial uses.
