S-95198A514 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: Viton® fluoroelastomer O-ring ensures reliable sealing in high-pressure environments up to 1500 psi, preventing leaks in critical applications.
• Exceptional Corrosion Resistance: Made from 18-8 stainless steel, offering excellent durability and resistance to rust in harsh industrial conditions.
• High Tensile Strength: Withstands up to 100,000 psi tensile strength, providing reliable fastening under heavy loads without failure.
• Precision Thread Fit: Class 3A fine thread (UNF) ensures tight, secure connections with minimal backlash for vibration-resistant assemblies.
• Wide Temperature Tolerance: O-ring maintains integrity from -20° to 400°F, suitable for extreme thermal cycles in automotive or machinery applications.
• Standard-Compliant Design: Meets ASME B18.3, DIN 912, and ISO 4762 standards, guaranteeing interchangeability and quality in global supply chains.
• Easy Installation & Removal: Hex socket drive (3/16") allows for efficient torque application with standard tools, reducing assembly time.

Professional Applications & Engineering Value

This 1/4"-28 UNF socket head cap screw with Viton® O-ring is engineered to address sealing challenges in high-pressure and temperature-variable environments. The 18-8 stainless steel construction provides robust corrosion resistance, ideal for industrial machinery, hydraulic systems, and automotive assemblies where exposure to moisture, chemicals, or extreme temperatures is common. The fine thread and Class 3A fit ensure precise engagement, reducing the risk of loosening under vibration—a critical factor in precision engineering. Combined with the O-ring's ability to handle pressures up to 1500 psi, this screw delivers reliable performance in sealing applications, minimizing downtime and maintenance costs for B2B clients in sectors like aerospace, oil & gas, and manufacturing.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF thread with Class 3A fit for high precision, a fully threaded design, and dimensions including a 1/2" length and 3/8" head diameter. It complies with ASME B18.3, DIN 912, and ISO 4762 standards, ensuring consistent quality and interchangeability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for global industrial use.