S-95198A356 5/16"-18 x 1 1/8" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance – Integrated Buna-N O-ring provides reliable sealing up to 1500 psi and withstands temperatures from -40° to 225° F, preventing leaks in demanding environments.
• Exceptional Corrosion Resistance – Made from 18-8 stainless steel, offering excellent durability and resistance to rust in harsh industrial settings.
• High Tensile Strength & Hardness – With 100,000 psi tensile strength and Rockwell B85 hardness, this screw ensures long-term reliability under high-stress conditions.
• Precision Thread Fit – Class 3A thread fit guarantees tight, secure fastening with minimal play, enhancing assembly integrity.
• Wide Industry Compliance – Meets ASME B18.3, DIN 912, and ISO 4762 standards, ensuring compatibility and quality for global engineering projects.
• Easy Installation with Hex Drive – Standard 1/4" hex drive socket head allows for straightforward, tool-friendly installation in confined spaces.
• Environmental & Safety Compliance – RoHS 3 and REACH compliant, making it suitable for regulated industries without harmful substances.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address critical sealing and durability challenges in industrial applications. The 18-8 stainless steel construction provides robust corrosion resistance, ideal for environments exposed to moisture, chemicals, or extreme temperatures. The integrated Buna-N rubber O-ring seal ensures leak-proof performance in hydraulic systems, pneumatic equipment, and fluid handling assemblies, where maintaining pressure integrity is essential. With a Class 3A thread fit and UNC coarse threading, it offers quick, secure fastening while reducing the risk of cross-threading. Commonly used in machinery, automotive, and aerospace sectors, this screw delivers reliable sealing solutions that minimize downtime and maintenance costs, supporting efficient and safe operations.

Specification Summary & Compliance

This product features a 5/16"-18 UNC thread with Class 3A precision fit, ensuring dimensional accuracy and reliable performance. It is manufactured in compliance with ASME B18.3, DIN 912, and ISO 4762 standards, guaranteeing consistent quality and interchangeability. Additionally, it adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for industrial use.