S-95198A344 1/4"-28 x 5/8" 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 fluid and gas sealing up to 1500 psi, preventing leaks in pressurized systems.
• Excellent Corrosion Resistance: Made from 18-8 Stainless Steel, offering durability in harsh environments and resistance to rust and oxidation.
• High Tensile Strength & Durability: With a 100,000 psi tensile strength and Rockwell B85 hardness, it withstands high stress and repetitive loads without failure.
• Precision Thread Fit for Secure Fastening: Class 3A thread fit with UNF fine threads provides tight, vibration-resistant connections in critical assemblies.
• Wide Temperature Tolerance: Operates effectively from -40° to 225° F, maintaining seal integrity and mechanical properties in extreme conditions.
• Easy Installation with Standard Tools: 3/16" hex drive and standard socket head profile allow for quick, tool-compatible installation and removal.
• Compliance with International Standards: Meets ASME B18.3, DIN 912, and ISO 4762 specifications, ensuring reliability and interchangeability in global applications.

Professional Applications & Engineering Value

This 1/4"-28 UNF Socket Head Cap Screw is engineered to address common challenges in industrial sealing and high-pressure environments. The 18-8 Stainless Steel construction provides excellent corrosion resistance, making it ideal for applications in chemical processing, marine equipment, and food machinery where moisture and corrosive agents are present. The Buna-N rubber O-ring integrated into the design ensures a secure seal, preventing fluid or gas leakage in hydraulic systems, pneumatic controls, and pump assemblies. With a fine thread spacing and Class 3A thread fit, it offers superior vibration resistance and precise alignment in tightly toleranced components, reducing maintenance needs and downtime. Fully threaded for consistent grip, this screw is a reliable choice for OEMs and maintenance teams seeking durable, high-performance socket head cap screws that meet rigorous industry standards.

Specification Summary & Compliance

This product features a 1/4"-28 UNF thread with Class 3A fit for high precision and fine thread spacing, ensuring secure fastening. It complies with ASME B18.3, DIN 912, and ISO 4762 standards for dimensional accuracy and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.