S-95198A301 8-32 x 5/8" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance – Integrated Buna-N rubber O-ring provides reliable leak prevention, ideal for pressurized systems up to 1500 psi.
• High Tensile Strength – 100,000 psi tensile rating ensures dependable load-bearing capacity in demanding mechanical assemblies.
• Wide Temperature Resilience – Maintains sealing integrity and mechanical properties across a broad range from -40°F to 225°F.
• Precision Thread Fit – Class 3A thread tolerance guarantees secure, vibration-resistant fastening with minimal backlash.
• Corrosion-Resistant Material – 18-8 stainless steel construction offers excellent resistance to rust and chemical exposure in harsh environments.
• Standardized Socket Drive – Hex drive (9/64") enables high-torque installation with common tools, reducing assembly time.
• Full Thread Engagement – Fully threaded design allows for adjustable clamping force along the entire 5/8" length.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address critical sealing and fastening challenges in industrial equipment, hydraulic systems, and precision machinery. The combination of 18-8 stainless steel and a Buna-N rubber O-ring ensures long-term reliability in environments exposed to moisture, chemicals, or thermal cycling. With its UNC coarse thread and Class 3A fit, the screw resists loosening under vibration while facilitating quick assembly. It is particularly valuable in applications requiring consistent pressure containment—such as fluid power components, pump housings, and valve assemblies—where failure prevention is paramount. The standardized hex drive and compliance with major international specifications further simplify procurement and integration into global supply chains.

Specification Summary & Compliance

This screw meets ASME B18.3, DIN 912, and ISO 4762 dimensional standards, with a Class 3A thread fit for precision assembly. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations. The UNC coarse thread (8-32 size) and fully threaded 5/8" length provide consistent performance across industrial applications.