S-91274A252 5/16"-18 x 1 1/2" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-flake coating, ideal for harsh industrial environments
• High tensile strength of 170,000 psi ensures reliable performance in demanding applications
• Precision Class 3A thread fit provides superior engagement and vibration resistance
• Rockwell C37 hardness offers excellent durability and wear resistance
• Standard hex drive design allows for easy installation with common tools
• Full threading along 1-1/2" length enables flexible positioning and secure fastening
• Compliance with major industry standards guarantees quality and regulatory acceptance

Professional Applications & Engineering Value

This zinc-flake-coated alloy steel socket head cap screw delivers outstanding engineering value for heavy-duty industrial applications where corrosion resistance and high strength are critical. The 5/16"-18 UNC coarse thread configuration ensures rapid assembly and reliable performance in vibration-prone environments, while the Class 3A thread fit maintains precise tolerances for secure fastening. The zinc-flake coating provides superior protection against corrosion, making these socket head cap screws ideal for machinery, equipment manufacturing, and structural applications requiring long-term reliability. With 170,000 psi tensile strength and Rockwell C37 hardness, these fasteners withstand extreme mechanical stresses while maintaining integrity in demanding operating conditions.

Specification Summary & Compliance

This socket head cap screw features 5/16"-18 UNC coarse threads with Class 3A thread fit for precision engagement. Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, with corrosion resistance verified per ASTM B117. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.