S-91205A359 10-32 x 3" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch thread locker prevents loosening under dynamic loads, ensuring long-term assembly integrity.
• Exceptional tensile strength of 170,000 psi provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Temperature stability from -70° to 250°F maintains locking and mechanical properties in extreme operating environments.
• Precise Class 3A thread fit offers superior engagement and clamping force for critical assemblies requiring minimal tolerance.
• Corrosion-resistant black-oxide finish on alloy steel enhances durability and extends service life in harsh industrial conditions.
• Hex socket drive design allows for high-torque installation and easy access in confined spaces, improving installation efficiency.
• Compliance with ASME B18.3 and environmental standards ensures consistent quality and safe use in regulated industries.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this 10-32 UNF socket head cap screw combines black-oxide alloy steel with a nylon patch locking feature to address common challenges like vibration-induced loosening and thermal cycling. The fine UNF thread and Class 3A fit provide secure fastening in precision machinery, automotive systems, and electronic enclosures where alignment and reliability are critical. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands heavy loads without stripping or shearing, making it ideal for assembly lines, robotics, and aerospace components that require repeated disassembly and reassembly. The partially threaded design allows for optimized grip length, reducing material stress and improving joint stability in dynamic environments.

Specification Summary & Compliance

This screw features a 10-32 UNF fine thread with Class 3A thread fit for high precision, a 5/32" hex drive, and a 3" length with partial threading. It meets ASME B18.3 specifications for dimensional consistency and is manufactured from alloy steel per ASTM A574. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, it ensures environmental safety and regulatory adherence in global markets.