S-95198A258 2-56 x 3/16" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with a Buna-N O-Ring that reliably prevents leaks in high-pressure applications up to 1500 psi.
• Excellent corrosion resistance due to 18-8 Stainless Steel construction, ensuring long-term durability in harsh environments.
• High tensile strength of 100,000 psi provides reliable fastening under heavy loads, reducing the risk of mechanical failure.
• Wide temperature tolerance from -40° to 225°F allows consistent performance in extreme thermal conditions without O-Ring degradation.
• Precise Class 3A thread fit ensures tight, secure connections with minimal backlash for vibration-resistant assemblies.
• Hex socket drive design enables easy installation and removal with standard tools, improving maintenance efficiency.
• Compliance with major standards including ASME B18.3, DIN 912, and ISO 4762 guarantees interoperability and quality assurance.

Professional Applications & Engineering Value

This Socket Head Cap Screw with a Buna-N O-Ring seal is engineered to address critical sealing challenges in industrial settings. The 18-8 Stainless Steel material offers robust corrosion resistance, while the UNC coarse thread and Class 3A fit provide secure fastening in high-vibration environments like machinery, automotive systems, and fluid handling equipment. The integrated O-Ring effectively seals against liquids and gases, preventing leaks in applications subjected to pressures up to 1500 psi and temperatures from -40° to 225°F. Its fully threaded design ensures uniform clamping force, making it ideal for high-pressure fastening in pumps, valves, and hydraulic systems where reliability is paramount.

Specification Summary & Compliance

This screw features a 2-56 UNC thread with Class 3A precision tolerance, coarse thread spacing, and a length of 3/16 inch. It is manufactured in compliance with ASME B18.3, DIN 912, and ISO 4762 standards, ensuring dimensional accuracy and performance consistency. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.