S-90696A187 1/4"-28 x 11/16" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Superior thread engagement and vibration resistance thanks to the Class 3A UNF fine thread fit, ensuring a secure and precise connection.
• High tensile strength of 70,000 PSI and Rockwell B70 hardness for demanding applications requiring heavy-duty performance.
• Reliable torque transmission and low-profile installation enabled by the standard socket head and 3/16" hex drive, minimizing stripping and providing a clean finish.
• Full threading along the 11/16" length offers maximum adjustability and holding power throughout the entire fastener.
• Guaranteed dimensional consistency and interchangeability as it meets the rigorous ASME B18.3 standard.
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental directives.

Professional Applications & Engineering Value

This 1/4"-28 UNF Socket Head Cap Screw is engineered to solve critical challenges in precision assembly. The 18-8 Stainless Steel material provides excellent resistance to oxidation and corrosion, making it a top choice for applications in marine, chemical processing, and food equipment where moisture and corrosive agents are present. The Class 3A fine thread (UNF) ensures a tighter, more reliable fit compared to coarse threads, significantly reducing the risk of loosening under vibration—common in machinery, automotive, and aerospace assemblies. The combination of a 70,000 PSI tensile strength and standard socket head profile allows for high clamp loads and easy installation in confined spaces, delivering robust performance and engineering reliability for your most demanding industrial socket screw applications.

Specification Summary & Compliance

This socket head cap screw features a 1/4"-28 UNF thread with a Class 3A thread fit for high precision. It is fully threaded, with a length of 11/16", a 3/8" head diameter, and a 1/4" head height. Manufactured in compliance with ASME B18.3 specifications, ensuring dimensional accuracy and performance. 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.