S-93140A404 4-40 x 3/16" 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
- Excellent chemical and impact resistance from durable polycarbonate plastic for long-lasting performance in harsh environments.
- Optical clarity allows for visual inspection and is ideal for applications where aesthetics or light transmission are important.
- Reliable fastening with Class 2A thread fit ensures consistent engagement and secure connections in assembly.
- Wide operating temperature range from -40° to 210° F provides dependable performance in both extreme cold and high-heat conditions.
- Standard 82° countersink angle enables a flush, clean finish for a professional appearance and reduced snagging.
- Full threading along the 3/16" length offers maximum grip and holding power in a compact form factor.
- Compliance with ASME B18.6.3 and RoHS 3 guarantees adherence to rigorous industrial standards and environmental safety regulations.
Professional Applications & Engineering Value
This 4-40 UNC flat head slotted screw is engineered to solve critical challenges in precision assembly. The polycarbonate plastic construction provides inherent electrical insulation and corrosion resistance, making it perfect for electronic enclosures, medical devices, and optical equipment where metal fasteners could cause interference or contamination. The clear color maintains product aesthetics and allows for easy visual confirmation of proper installation. Its coarse thread spacing (UNC) and fully threaded design ensure rapid installation and superior pull-out strength in plastic and soft material applications. The combination of a standard 82° countersink angle and a flat head creates a seamless, low-profile finish that minimizes protrusion and improves safety in moving assemblies.
Specification Summary & Compliance
This screw features a 4-40 UNC thread with a Class 2A tolerance for consistent fit. It is manufactured to meet the dimensional requirements of ASME B18.6.3 and is RoHS 3 (2015/863/EU) Compliant, ensuring it is free from hazardous substances. The right-hand thread direction and coarse thread spacing are standard for reliable performance in industrial fastening applications.
