S-91251A865 3/4"-10 x 9 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh environments, minimizing maintenance needs.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, enhancing assembly integrity and safety.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use.
• Partially threaded design allows for optimal clamping force distribution, ideal for applications requiring specific grip lengths.
• Hex socket drive compatibility with 5/8" drive size enables easy installation in confined spaces using standard tools.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global industrial use.

Professional Applications & Engineering Value

Engineered for demanding environments, these black-oxide alloy steel socket head cap screws deliver robust performance where high tensile strength and corrosion resistance are critical. The 3/4"-10 UNC coarse thread and Class 3A fit provide superior holding power in heavy machinery, automotive assemblies, and structural frameworks, resisting loosening under vibration. The partially threaded shank concentrates clamping force precisely, reducing stress concentrations in bolted joints. With a Rockwell C37 hardness and ASTM A574 compliance, these screws withstand extreme loads and repetitive use, making them ideal for industrial fastening in manufacturing, construction, and equipment maintenance where durability and reliability are non-negotiable.

Specification Summary & Compliance

This socket head cap screw features a 3/4"-10 UNC coarse thread with Class 3A thread fit for high precision, a minimum thread length of 2 1/2", and a total length of 9 1/2". Manufactured to ASTM A574 specifications, it ensures consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards for industrial use.