S-90696A199 5/16"-18 x 6 1/2" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
• High-strength fastening with a tensile strength of 70,000 psi, ensuring reliable performance under heavy loads and vibration.
• Precise thread engagement provided by the Class 3A UNC thread fit, minimizing the risk of cross-threading and ensuring a secure connection.
• Enhanced durability and wear resistance from Rockwell B70 hardness, extending the screw's service life in demanding applications.
• Secure hex drive installation with a 1/4" drive size, allowing for high torque application and reducing the risk of tool slippage.
• Versatile partial threading on a 6 1/2" length, offering flexibility for applications requiring both clamped and unthreaded sections.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring product quality and environmental safety.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Socket Head Cap Screw is engineered to address critical challenges in industrial assembly and machinery. The 5/16"-18 UNC coarse thread with a Class 3A fit provides excellent engagement in a variety of materials, reducing installation time and preventing stripping. The hex drive and socket head design allow for high-torque tightening in confined spaces, a common requirement in automotive, aerospace, and heavy equipment manufacturing. The partially threaded shank on the 6 1/2" length is ideal for applications where a specific section must remain unclamped, such as in linkages or pivoting mechanisms. Its inherent corrosion resistance and high 70,000 psi tensile strength make it a dependable choice for structural frames, conveyor systems, and other applications demanding long-term reliability and performance under stress.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC thread with a Class 3A precision fit, ensuring high dimensional accuracy and reliable performance. It is manufactured in compliance with the ASME B18.3 standard for socket head cap screws. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for hazardous substances.