S-90044A431 3/8"-16 x 2 3/8" ASME B18.3, 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 applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments, minimizing maintenance needs.
• Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
• Partially threaded design allows for optimal clamping force distribution, ideal for applications requiring specific grip lengths.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and installation.
• Coarse UNRC threads enable quicker installation and better performance in materials prone to stripping or where debris is present.
• Compliance with ASME B18.3 and ASTM A574 guarantees consistent quality and interchangeability, streamlining procurement and inventory management.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, automotive systems, and construction equipment. The 3/8"-16 coarse thread and Class 3A fit ensure rapid, secure fastening even in high-vibration environments, reducing downtime and maintenance costs. Its partially threaded rod type allows precise load-bearing control, preventing joint slippage in dynamic applications. Made from alloy steel with a black-oxide surface treatment, it combats corrosion and wear, extending component life in exposed or humid conditions. By meeting ASME B18.3 standards, it delivers reliable performance for engineers prioritizing safety and durability in critical fastening solutions.

Specification Summary & Compliance

This socket head cap screw features a 3/8"-16 UNRC coarse thread with a Class 3A thread fit for high precision and strength. Dimensions include a length of 2 3/8", head diameter of 9/16", and drive size of 5/16" hex. It conforms to ASME B18.3 and ASTM A574 manufacturing specifications, ensuring consistent quality. 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.