S-94414A588 5/16"-18 x 1 1/4" ASME B18.3, ASTM F835 Alloy Steel Torx Flat Head Screws
Alloy Steel Torx 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 torque transmission with Torx Plus IP40 drive for reduced cam-out and enhanced installation efficiency
- Exceptional corrosion resistance provided by black-oxide coating on alloy steel for extended service life in demanding environments
- High-strength performance with 140,000 psi tensile strength and Rockwell C39 hardness for reliable load-bearing capacity
- Precision thread fit with Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
- Optimal flush mounting with standard 82° flat head profile for smooth surface finishes in countersunk applications
- Full threading coverage along the 1-1/4" length for maximum grip and uniform stress distribution
- Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, quality-assured industrial use
Professional Applications & Engineering Value
This 5/16"-18 UNC flat head screw delivers critical engineering solutions where high tensile strength and corrosion resistance are paramount. The black-oxide alloy steel construction withstands harsh operational conditions, while the Torx Plus IP40 drive minimizes tool slippage during high-torque assembly in machinery, automotive, and structural frameworks. Its Class 3A thread fit and coarse threading provide rapid installation and reliable clamping force, reducing maintenance intervals. Ideal for industrial fasteners in heavy-duty equipment, this screw ensures longevity and performance consistency under dynamic loads.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit and UNC coarse threads for precise dimensional accuracy. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards. The screw features a standard 82° countersink angle and right-hand thread direction, adhering to inch system measurements for compatibility in global industrial applications.
