S-90696A251 5/8"-18 x 5" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications.
• Precise, secure fastening thanks to the Class 3A thread fit and 5/8"-18 UNF fine thread, minimizing the risk of loosening.
• Efficient installation and removal with the 1/2" hex drive and standard socket head profile, allowing for high torque application.
• Optimized thread engagement due to the partially threaded design and 1 3/4" minimum thread length, providing flexibility in material thickness.
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
• Durable, wear-resistant performance ideal for repetitive use in industrial settings.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address critical challenges in industrial assembly and machinery. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for environments exposed to moisture, chemicals, or extreme temperatures. The 5/8"-18 UNF fine thread and Class 3A fit ensure tight, reliable connections that resist vibration loosening, which is vital for high-stress applications in automotive, aerospace, and heavy equipment. The 1/2" hex drive allows for efficient torque transmission, reducing installation time and tool wear. Its partially threaded design offers versatility, allowing the unthreaded portion to act as a precision pilot or to accommodate varying material thicknesses without compromising clamp load. This combination of high tensile strength and precise threading makes it an ideal choice for engineers seeking durability and performance in industrial fasteners.

Specification Summary & Compliance

This socket head cap screw features a 5/8"-18 UNF fine thread with a Class 3A thread fit, ensuring high precision and tight tolerances. It is manufactured in accordance with ASME B18.3 standards, guaranteeing dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various industrial and international markets.