S-91251A358 10-32 x 5" 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, extending service life in harsh environments and minimizing maintenance needs.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing joint integrity.
• Fine 10-32 UNF threads offer improved load distribution and better sealing in fine-pitch applications compared to coarse threads.
• Efficient hex drive design with 5/32" drive size allows for high torque application and easy installation in confined spaces.
• Partially threaded shank enables precise clamping force control, ideal for components requiring specific unthreaded grip lengths.
• Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial use.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty machinery, automotive, and aerospace assemblies. The 10-32 UNF fine thread configuration, combined with a Class 3A fit, delivers superior resistance to loosening under vibration and dynamic loads, a common pain point in industrial settings. The high tensile strength of 170,000 psi and Rockwell C37 hardness ensure durability in high-stress applications, reducing downtime and replacement costs. Its partially threaded design allows for precise engagement in tapped holes, while the hex drive facilitates efficient installation with standard tools, making it ideal for compact or hard-to-reach areas. These features collectively enhance reliability in precision fastening tasks, from equipment frames to precision instruments.

Specification Summary & Compliance

This socket head cap screw adheres to ASTM A574 specifications, ensuring consistent quality and performance. It features a 10-32 UNF thread with Class 3A fit for high precision and fine thread spacing. Dimensions include a 5" length, 5/16" head diameter, and 5/32" hex drive size. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming it meets environmental and safety standards for industrial use.