S-95198A581 1/2"-20 x 3/4" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance - Viton® Fluoroelastomer O-Ring ensures reliable sealing in high-pressure applications up to 1500 psi, preventing leaks and contamination.
• Exceptional Temperature Resistance - Withstands extreme temperatures from -20° to 400° F, maintaining integrity in harsh industrial environments.
• High Tensile Strength & Durability - 18-8 Stainless Steel construction with 100,000 psi tensile strength and Rockwell B85 hardness offers long-lasting reliability under heavy loads.
• Precision Thread Fit - Class 3A fine UNF threads provide secure, vibration-resistant fastening with minimal risk of loosening.
• Easy Installation & Removal - 3/8" hex drive socket head allows for efficient torque application in confined spaces, reducing assembly time.
• Corrosion-Resistant Material - 18-8 Stainless Steel ensures excellent resistance to rust and corrosion, ideal for demanding applications.
• Broad Regulatory Compliance - Meets ASME B18.3, DIN 912, and ISO 4762 standards, with RoHS 3 and REACH compliance for global use.

Professional Applications & Engineering Value

This 1/2"-20 UNF Socket Head Cap Screw is engineered to address critical sealing challenges in high-pressure and temperature-variable environments. The Viton® Fluoroelastomer O-Ring provides a robust seal that prevents fluid or gas leaks in applications like hydraulic systems, pumps, and industrial machinery, where pressure fluctuations up to 1500 psi are common. Made from 18-8 Stainless Steel, it resists corrosion and maintains structural integrity, even in corrosive settings such as chemical processing or marine equipment. The Class 3A fine thread ensures a tight, precise fit, reducing the risk of vibration-induced failures in dynamic assemblies. Fully threaded and right-hand oriented, it offers consistent engagement for secure fastening in automotive, aerospace, and heavy machinery, enhancing operational safety and reducing maintenance downtime.

Specification Summary & Compliance

This screw features a 1/2"-20 UNF thread with Class 3A fit for high precision and fine thread spacing, ensuring reliable performance in threaded connections. It adheres to ASME B18.3, DIN 912, and ISO 4762 manufacturing standards, guaranteeing dimensional accuracy and interchangeability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety requirements for industrial use worldwide.