S-91274A260 5/16"-18 x 2" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws
Alloy Steel Socket 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
- Superior corrosion protection with zinc-flake coating that withstands harsh industrial environments and prevents rust
- Exceptional tensile strength rated at 170,000 psi for reliable performance in high-stress applications
- Precise Class 3A thread fit ensures secure fastening with minimal backlash and vibration resistance
- Rockwell C37 hardness provides excellent durability and resistance to wear and deformation
- Hex socket drive design allows for high torque application and easy installation in confined spaces
- Partial threading configuration offers optimal grip strength while reducing material usage and weight
- Full regulatory compliance with RoHS 3 and REACH standards for environmentally responsible manufacturing
Professional Applications & Engineering Value
These zinc-flake-coated socket head cap screws deliver critical performance advantages in demanding industrial settings. The UNC coarse thread design provides faster assembly and superior holding power in soft materials, while the alloy steel construction maintains structural integrity under extreme loads. The corrosion-resistant coating significantly extends service life in moisture-prone environments, making these industrial fasteners ideal for machinery, automotive assemblies, and heavy equipment where reliability is paramount. The partially threaded configuration allows for precise clamping force distribution, solving common challenges of joint slippage and stress concentration in critical connections.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread tolerances for precision fit, these 5/16"-18 UNC socket head cap screws comply with ASME B18.3 dimensional standards and ASTM A574 material specifications. The products meet ASTM B117 testing requirements for corrosion resistance and are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet the highest industry standards for quality and safety.
