S-92200A539 1/4"-20 x 5/8" MS16995-49, NAS1352C4-10, NASM16995, FF-S-86 Mil. Spec. 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh environments and extended service life.
• Superior load-bearing capability thanks to an 80,000 psi tensile strength, ensuring reliable performance under high stress.
• Precise and secure fastening with Class 3A thread fit, minimizing the risk of loosening in critical assemblies.
• Efficient installation and removal using a standard 3/16" hex drive, providing a secure grip and reducing tool slippage.
• Broad compatibility and reliability with coarse UNRC 1/4"-20 threads, offering excellent engagement in a wide range of materials.
• Full regulatory compliance with RoHS 3 and REACH, meeting stringent environmental and safety standards for global markets.
• Rigorous quality assurance through conformance to MS16995, NAS1352C4-10, NASM16995, and FF-S-86 specifications, ensuring consistent performance.

Professional Applications & Engineering Value

This 1/4-20 5/8" Socket Head Cap Screw is engineered for demanding industrial applications where precision and durability are non-negotiable. Crafted from 18-8 Stainless Steel and featuring a passivated finish, it provides outstanding resistance to corrosion and oxidation, making it ideal for use in machinery, automotive assemblies, and outdoor equipment exposed to moisture or chemicals. The Class 3A thread fit and coarse UNRC thread design ensure tight, reliable fastening that withstands vibration and dynamic loads, reducing maintenance needs and downtime. With a hex drive for easy installation in confined spaces, this fully threaded screw delivers consistent clamping force, enhancing the integrity of high-stress joints in aerospace, manufacturing, and construction projects.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and a coarse UNRC 1/4"-20 thread for robust engagement. It meets multiple industry specifications such as MS16995, NAS1352C4-10, NASM16995, and FF-S-86, ensuring reliability in critical applications. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible manufacturing and use.