S-95198A130 4-40 x 1/2" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated silicone rubber O-rings that withstand pressures up to 1500 psi, ensuring leak-proof connections in demanding environments.
• Exceptional corrosion resistance from 18-8 stainless steel construction, providing long-term durability and reliability in harsh or humid conditions.
• High tensile strength of 100,000 psi and Rockwell B85 hardness for reliable load-bearing capacity and resistance to deformation under stress.
• Precision Class 3A thread fit with UNC coarse threads for easy assembly, secure fastening, and reduced risk of cross-threading in industrial applications.
• Wide temperature tolerance from -80° to 400°F, making these screws suitable for extreme thermal cycles without compromising seal integrity.
• Compliance with major standards including ASME B18.3, DIN 912, and ISO 4762, ensuring consistent quality and interchangeability in global projects.
• Environmentally compliant design meeting RoHS 3 and REACH regulations, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

Engineered for high-pressure sealing applications, this socket head cap screw integrates a silicone rubber O-ring to address common failure points in fluid and gas systems. The 18-8 stainless steel material offers excellent corrosion resistance, crucial for industries like chemical processing, automotive, and aerospace where exposure to moisture or chemicals is frequent. With a UNC coarse thread and Class 3A fit, it ensures quick, precise installation while maintaining a tight seal under dynamic loads. This design minimizes downtime by preventing leaks in equipment subjected to pressures up to 1500 psi and temperature extremes from -80° to 400°F, making it ideal for pumps, valves, and hydraulic systems requiring reliable, long-term performance.

Specification Summary & Compliance

This screw features a 4-40 UNC thread with Class 3A fit for high precision and a 1/2" length to accommodate various assembly depths. It complies with ASME B18.3, DIN 912, and ISO 4762 standards, ensuring dimensional accuracy and global interoperability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.