S-91274A108 10-24 x 5/8" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity and drive features through repeated use.
• Hex socket drive design allows for high torque application and easy installation in confined spaces, improving assembly efficiency.
• Full threading ensures consistent engagement along the entire length, providing uniform clamping force and versatility in various material thicknesses.
• Compliance with major standards including ASME B18.3 and ASTM A574 guarantees consistent quality and interoperability with other components.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 10-24 UNC socket head cap screws deliver critical performance advantages where reliability is non-negotiable. The zinc-flake-coated alloy steel construction provides exceptional corrosion protection, solving the common problem of fastener degradation in humid, chemical, or outdoor settings. The Class 3A thread fit ensures precise engagement with mating components, eliminating play and preventing vibration-induced loosening in machinery, automotive assemblies, and precision equipment. With 170,000 psi tensile strength and Rockwell C37 hardness, these fasteners maintain structural integrity under heavy loads and repeated stress cycles. The hex socket drive enables high-torque installation without stripping, making them ideal for applications requiring flush mounting or limited access. These characteristics make them particularly valuable in industrial machinery, automotive systems, and heavy equipment where fastener failure could lead to costly downtime or safety hazards.

Specification Summary & Compliance

This socket head cap screw features precise 10-24 UNC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufacturing complies with ASME B18.3 for socket head cap screws, ASTM A574 for alloy steel socket head cap screws, and ASTM B117 for salt spray testing of the zinc-flake coating. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various applications without hazardous substance restrictions.