S-94414A383 5/16"-18 x 1" ASME B18.3, ASTM F835 Alloy Steel Torx Flat Head Screws
Alloy Steel Torx Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional torque transmission with Torx Plus IP40 drive, reducing cam-out and tool wear for reliable installation
- Superior corrosion resistance from black-oxide coating on alloy steel, extending service life in demanding environments
- High-load capacity with 140,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precise thread engagement through Class 3A fit and UNC coarse threading, ensuring vibration resistance and secure fastening
- Flush mounting capability with standard 82° countersink angle, providing smooth surface finishes in assembled products
- Full-thread design maximizing grip length and distribution of clamping force across the entire fastener
- Regulatory compliance meeting ASME B18.3 specifications and environmental standards (RoHS 3 & REACH) for global supply chain integration
Professional Applications & Engineering Value
These 5/16"-18 UNC flat head screws deliver critical performance in industrial assemblies where vibration resistance and high tensile strength are paramount. The black-oxide alloy steel construction provides durable protection against oxidation, while the Torx Plus IP40 drive enables higher torque application without stripping—ideal for automated assembly lines. Engineers specify these Class 3A thread fasteners for machinery, heavy equipment, and structural frameworks where coarse thread spacing ensures rapid installation and reliable retention under dynamic loads. The 82° countersink profile facilitates seamless integration into precision components, eliminating protrusions in confined spaces.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit ensuring precise dimensional accuracy. Threading conforms to UNC standards with coarse spacing for optimal engagement in various materials. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no restricted substances. The inch-system measurements maintain consistency with North American industrial standards for seamless replacement and inventory management.
