S-91251A251 10-24 x 1 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 under high-stress conditions, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh industrial environments.
• Precise Class 3A thread fit provides consistent engagement and vibration resistance, minimizing loosening in dynamic applications.
• Hex socket drive design allows for high torque application and easy installation in confined spaces with standard tools.
• Partially threaded shank offers flexibility for clamping unthreaded sections while maintaining full thread engagement where needed.
• Compliance with ASTM A574 guarantees material quality and manufacturing consistency for engineering-critical assemblies.
• Rockwell C37 hardness balances durability with machinability, resisting wear without becoming brittle.

Professional Applications & Engineering Value

Engineered for demanding industrial fastening applications, these socket head cap screws combine black-oxide alloy steel construction with 10-24 coarse UNRC threads to deliver robust clamping force and vibration resistance. The partially threaded design is ideal for machinery, automotive, and equipment assembly where precise alignment and load distribution are critical. The hex drive facilitates secure installation in tight spaces, while the corrosion-resistant surface ensures long-term reliability in environments exposed to moisture, chemicals, or temperature variations. This combination addresses common challenges like thread stripping, galvanic corrosion, and maintenance downtime, making these screws a trusted choice for OEMs and maintenance teams.

Specification Summary & Compliance

This socket head cap screw features a 10-24 coarse thread with Class 3A fit for tight tolerances and a 1-1/2" length with a minimum thread length of 7/8". Manufactured to ASTM A574 specifications, it ensures consistent mechanical properties and dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in global markets.