S-90696A177 6-40 x 1 1/4" 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 long-term reliability.
• High tensile strength of 70,000 psi ensures secure, durable fastening under significant mechanical stress and vibration.
• Precise Class 3A thread fit provides tighter tolerances for improved assembly accuracy and reduced risk of loosening.
• Hex socket drive (7/64") allows for high-torque installation and removal in confined spaces without stripping.
• Partially threaded design with 3/4" min thread length offers optimal grip and clamping force for specific joint requirements.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees consistent quality and environmental safety for global supply chains.
• Rockwell B70 hardness enhances wear resistance and maintains thread integrity through repeated use.

Professional Applications & Engineering Value

This 6-40 UNC thread socket head cap screw is engineered to address critical challenges in precision assembly and high-stress applications. The 18-8 Stainless Steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for industrial machinery, automotive components, and electronic enclosures where durability is paramount. The fine thread spacing and Class 3A fit ensure minimal backlash and superior vibration resistance, reducing maintenance needs in dynamic systems. With a right-hand thread and standard socket head profile, it facilitates efficient installation using common hex tools, streamlining production workflows while meeting rigorous ASME B18.3 specifications for dimensional consistency.

Specification Summary & Compliance

This socket head cap screw features a 1-1/4" length with UNC thread form and Class 3A thread fit for high precision. It adheres to ASME B18.3 manufacturing standards, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial markets.