S-95198A350 5/16"-18 x 3/8" 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 ensures reliable leak-proof sealing in demanding applications, maintaining integrity from -40° to 225° F.
• Exceptional Corrosion Resistance – Made from 18-8 Stainless Steel, offering excellent durability and longevity in harsh or corrosive environments.
• High Tensile Strength & Reliability – With 100,000 psi tensile strength and Rockwell B85 hardness, it withstands high-stress conditions without failure.
• Precision Thread Fit for Secure Fastening – Class 3A UNC coarse threads provide tight, vibration-resistant connections with minimal risk of loosening.
• Wide Pressure & Temperature Tolerance – Rated for up to 1500 psi pressure and a broad temperature range, ideal for fluid and gas systems.
• Space-Saving Socket Head Design – Standard socket head with 1/4" hex drive allows for easy installation in confined spaces using common tools.
• Fully Threaded for Maximum Grip – Ensures consistent clamping force along the entire 3/8" length, enhancing joint stability.

Professional Applications & Engineering Value

This Socket Head Cap Screw with integrated Buna-N O-Ring is engineered to address critical sealing and fastening challenges in industrial settings. The 18-8 Stainless Steel construction resists corrosion, while the Class 3A UNC coarse thread ensures precise, durable connections that resist vibration and shock. Ideal for hydraulic systems, pneumatic equipment, and machinery requiring pressure containment up to 1500 psi, it prevents leaks in ports and fittings. The fully threaded design and standard socket head facilitate quick assembly in tight spaces, reducing downtime and maintenance costs. By combining robust materials with advanced sealing technology, this fastener delivers long-term reliability in automotive, aerospace, and manufacturing applications where performance under extreme conditions is non-negotiable.

Specification Summary & Compliance

This product features precise 5/16"-18 UNC coarse threads with a Class 3A fit for high accuracy and strength. It complies with ASME B18.3, DIN 912, and ISO 4762 standards, ensuring consistent quality and interchangeability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for global use.