S-91274A168 1/4"-20 x 7/8" 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 maintains structural integrity under heavy loads
• Hex socket drive design allows for high-torque installation in confined spaces
• Full threading along 7/8" length offers maximum adjustability and holding power
• Compliance with major industry standards guarantees quality and regulatory acceptance

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these socket head cap screws deliver critical performance advantages where reliability matters most. The zinc-flake-coated alloy steel construction provides superior protection against corrosion in manufacturing, automotive, and machinery applications, significantly extending service life. With UNC coarse threads and Class 3A fit, these fasteners ensure precise alignment and secure fastening in high-vibration environments. The combination of 170,000 psi tensile strength and Rockwell C37 hardness makes them ideal for structural assemblies, equipment frames, and precision machinery where failure is not an option. The hex drive socket head design enables efficient installation in confined spaces while accommodating high torque requirements.

Specification Summary & Compliance

This 1/4"-20 x 7/8" socket head cap screw features precision UNC coarse threads with Class 3A fit for superior thread engagement. Manufactured to ASME B18.3 and ASTM A574 specifications, with corrosion resistance verified per ASTM B117. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets.