S-95198A343 1/4"-28 x 1/2" 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 ensures reliable sealing against fluids and gases, maintaining integrity under pressures up to 1500 psi.
• High Tensile Strength & Durability: 100,000 psi tensile strength and Rockwell B85 hardness provide exceptional resistance to stripping and fatigue in demanding applications.
• Precision Thread Fit: Class 3A fine UNF threads deliver tighter tolerances and reduced risk of loosening, enhancing assembly reliability.
• Wide Temperature Resilience: Operates effectively from -40° to 225°F, making it suitable for environments with thermal fluctuations.
• Corrosion-Resistant Material: 18-8 Stainless Steel construction offers excellent resistance to rust and oxidation, extending service life in harsh conditions.
• Standard-Compliant Design: Meets ASME B18.3, ISO 4762, and DIN 912 standards, ensuring compatibility and interchangeability in global industrial systems.
• Environmental & Safety Compliance: RoHS 3 and REACH compliant, supporting sustainable and safe manufacturing practices without hazardous substances.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to address critical sealing and mechanical challenges in high-pressure industrial systems, such as hydraulic assemblies, pneumatic equipment, and precision machinery. The 18-8 Stainless Steel material, combined with a Buna-N Rubber O-Ring, provides a robust barrier against leaks, even under fluctuating temperatures and pressures. Its fine UNF threads and Class 3A fit ensure minimal backlash and secure fastening, reducing maintenance needs in applications like automotive components, fluid power systems, and heavy-duty enclosures. By integrating standardized dimensions and sealing features, it streamlines assembly processes while enhancing operational safety and longevity.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 3A thread fit for superior accuracy and UNF fine threading (1/4"-28) to optimize load distribution. Manufactured in compliance with ASME B18.3, ISO 4762, and DIN 912 specifications, it guarantees consistent performance and interchangeability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring environmental safety and material sustainability in industrial use.