S-95198A333 1/4"-20 x 1/2" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• High-pressure sealing capability up to 1500 psi, thanks to the integrated Buna-N rubber O-ring that prevents leaks in critical applications.
• Exceptional tensile strength of 100,000 psi ensures durability and load-bearing capacity under demanding mechanical stresses.
• Precise Class 3A thread fit provides tight tolerances and secure fastening, reducing the risk of loosening in vibration-prone settings.
• Wide temperature compatibility from -40°F to 225°F, allowing consistent performance in varied operational conditions.
• Easy installation with hex socket drive enables efficient torque application and access in confined spaces, minimizing assembly time.
• Compliance with international standards including ASME B18.3, DIN 912, and ISO 4762, ensuring interoperability and quality assurance.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to address common industrial challenges such as fluid leakage, corrosion degradation, and fastener failure in high-stress assemblies. The 18-8 Stainless Steel material offers excellent resistance to rust and chemicals, making it suitable for machinery, automotive, and plumbing systems exposed to moisture or aggressive substances. The UNC coarse threads and Class 3A fit ensure quick, reliable engagement and vibration resistance, while the Buna-N O-ring provides an effective seal against oils, water, and gases up to 1500 psi. By integrating sealing features directly into the screw design, it eliminates the need for additional gaskets, streamlining installation and reducing maintenance costs in pneumatic, hydraulic, and precision equipment applications.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 3A precision fit for accurate alignment and secure fastening. It is fully threaded with a standard socket head profile and complies with ASME B18.3, DIN 912, and ISO 4762 manufacturing specifications. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various industries without hazardous substances.