S-98130A650 3/8"-16 x 4" Pentagon Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• High-torque application capability thanks to the external pentagon head and 13/16" drive size, preventing stripping and ensuring secure fastening.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty, high-stress assemblies.
• Reliable and quick installation with coarse UNC threading and Class 2A thread fit, reducing cross-threading risks and speeding up assembly.
• Full-length thread engagement across the 4" length, providing consistent clamping force and vibration resistance in deep applications.
• Compliance with strict environmental standards, including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Durable pentagon head design offers a secure grip with standard tools, enhancing usability in repetitive or high-torque scenarios.

Professional Applications & Engineering Value

This 3/8"-16 UNC pentagon head screw is engineered to address critical challenges in industrial and construction settings, where corrosion resistance and high tensile strength are paramount. Made from 18-8 Stainless Steel, it withstands corrosive elements, reducing maintenance and replacement costs in outdoor, marine, or chemical-exposed applications. The external pentagon drive and coarse UNC thread ensure efficient installation with common tools, minimizing assembly time and tool wear. Its fully threaded design and Class 2A thread fit provide uniform load distribution, preventing loosening under vibration—ideal for machinery, structural frameworks, and heavy equipment that demand reliability and durability in demanding operational conditions.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including UNC coarse threads with a Class 2A thread fit for consistent accuracy and interchangeability. Key specifications include a 3/8"-16 thread size, 4" length, and full threading. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use. Manufactured to deliver reliable performance, it meets common industry requirements for strength and safety without additional certifications like ASME.