S-91251A342 10-32 x 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 in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life and maintaining integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening and improving joint reliability.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity and drive features through repeated use and high torque applications.
• Fine UNRF threads deliver enhanced clamping force and better sealing in precision assemblies compared to coarse threads.
• 5/32" hex drive design allows for easy installation and removal with standard tools, reducing assembly time and improving workflow efficiency.
• Full thread coverage along the 1/2" length ensures consistent engagement and uniform stress distribution, ideal for varied material thicknesses.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in precision machinery, automotive, and aerospace assemblies where vibration resistance and high tensile strength are paramount. The 10-32 UNRF fine thread with Class 3A fit ensures minimal backlash and superior clamp load retention, preventing joint failure in dynamic environments. The socket head design with a 5/32" hex drive facilitates installation in confined spaces, while the black-oxide surface treatment provides a durable barrier against oxidation and wear. Ideal for securing critical components in engines, robotics, and industrial equipment, this screw combines high Rockwell C37 hardness with 170,000 psi tensile strength to withstand extreme operational stresses without compromising performance.

Specification Summary & Compliance

This socket head cap screw adheres to Class 3A thread fit for precise dimensional accuracy and is manufactured in accordance with ASTM A574 specifications, ensuring consistent quality and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally sensitive and regulated industries without hazardous substance restrictions.