S-91205A351 10-32 x 1 1/2" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant performance with permanent Nylon patch thread locker, maintaining secure fastening from -70° to 250°F in demanding environments.
• Exceptional tensile strength of 170,000 psi, ensuring reliable load-bearing capacity and durability under high-stress conditions.
• Precise Class 3A thread fit for superior engagement and reduced risk of cross-threading in fine-thread UNF applications.
• Corrosion-resistant black-oxide finish on alloy steel, providing enhanced protection against wear and oxidation in industrial settings.
• Rockwell C37 hardness offering excellent resistance to deformation and extended service life in repetitive assembly operations.
• Hex drive compatibility with 5/32" drive size, enabling easy installation and removal with standard tools in confined spaces.
• Partially threaded design allowing for controlled clamping force and reduced weight in precision assemblies.

Professional Applications & Engineering Value

Engineered for industrial and mechanical systems requiring vibration-resistant fastening, this 10-32 UNF socket head cap screw addresses common challenges like loosening under dynamic loads. The Nylon patch thread locker ensures consistent locking performance across a wide temperature range (-70° to 250°F), making it ideal for automotive, aerospace, and heavy machinery applications. Constructed from black-oxide alloy steel, it combines high tensile strength (170,000 psi) with fine thread precision (Class 3A fit) to prevent thread stripping and improve fatigue resistance. Its partially threaded configuration and hex drive design facilitate efficient assembly in tight spaces, reducing installation time and enhancing structural integrity in critical joints.

Specification Summary & Compliance

This screw adheres to ASME B18.3 and ASTM A574 specifications, ensuring dimensional accuracy and manufacturing consistency. The UNF fine thread with Class 3A thread fit guarantees tight tolerances for reliable performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety standards for global industrial use.