S-95198A147 8-32 x 5/16" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Reliable Sealing Under Extreme Conditions: Integrated silicone O-ring provides a durable seal effective from -80° to 400° F, preventing leaks in high-pressure environments up to 1500 psi.
• Superior Corrosion Resistance: Made from 18-8 Stainless Steel, offering excellent protection against rust and corrosion for long-lasting performance in harsh industrial settings.
• High Tensile Strength for Demanding Applications: With a tensile strength of 100,000 psi and Rockwell B85 hardness, this screw ensures secure, vibration-resistant fastening in critical assemblies.
• Precision Thread Fit for Secure Engagement: Class 3A UNC coarse threads deliver a tighter, more reliable fit, reducing the risk of stripping and ensuring consistent performance.
• Easy Installation with Hex Drive: Standard socket head and 9/64" hex drive allow for straightforward installation and removal with common tools, saving time on the assembly line.
• Full Threading for Maximum Grip: Fully threaded design provides uniform clamping force along the entire 5/16" length, enhancing joint integrity in various materials.
• Compliance with Global Standards: Meets ASME B18.3, DIN 912, and ISO 4762 specifications, ensuring interoperability and reliability in international engineering projects.

Professional Applications & Engineering Value

This 8-32 UNC thread socket head cap screw is engineered to address common challenges in industrial sealing and fastening. The 18-8 stainless steel construction offers robust resistance to corrosion and wear, ideal for environments exposed to moisture or chemicals. Paired with a silicone O-ring seal, it effectively prevents fluid and gas leaks in applications like hydraulic systems, pneumatic equipment, and machinery enclosures, where maintaining pressure integrity is critical. The coarse UNC thread and Class 3A fit ensure quick, secure installation in coarse-threaded holes, reducing assembly time while providing high vibration resistance. Commonly used in automotive, aerospace, and manufacturing sectors, this screw delivers reliable performance in high-stress scenarios, from sealing pumps to securing structural components, thanks to its 100,000 psi tensile strength and compliance with industry standards like ASME B18.3.

Specification Summary & Compliance

This screw features precise dimensions, including a 5/16" length, 8-32 UNC coarse thread with Class 3A fit for accurate engagement, and a maximum hole diameter of 0.177". It conforms to ASME B18.3, DIN 912, and ISO 4762 standards, ensuring consistent quality and compatibility. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances.