S-95198A349 1/4"-28 x 1 1/2" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Reliable Sealing Performance: Integrated Buna-N O-ring provides a secure seal against fluids and gases, ideal for high-pressure environments up to 1500 psi.
• Exceptional Strength and Durability: Made from 18-8 stainless steel with 100,000 psi tensile strength and Rockwell B85 hardness, ensuring long-term reliability in demanding applications.
• Precision Thread Fit: Class 3A UNF fine threads offer superior engagement and vibration resistance, minimizing the risk of loosening under stress.
• Wide Temperature Compatibility: O-ring functions effectively from -40° to 225°F, making it suitable for varied industrial and outdoor conditions.
• Easy Installation and Removal: Hex socket drive (3/16") allows for straightforward torque application with standard tools, reducing assembly time.
• Industry Standard Compliance: Meets ASME B18.3, DIN 912, and ISO 4762 specifications, ensuring interchangeability and quality assurance.
• Environmental and Safety Compliance: RoHS 3 and REACH compliant, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

This 1/4"-28 UNF Socket Head Cap Screw with an integrated Buna-N O-ring seal addresses critical sealing challenges in industrial machinery, hydraulic systems, and pneumatic equipment. The 18-8 stainless steel construction provides excellent corrosion resistance, while the Class 3A thread fit ensures tight, leak-proof connections even under high vibration. The fine UNF threads enhance grip in materials prone to stripping, and the partially threaded design allows for precise clamping without compromising seal integrity. Ideal for applications in automotive, aerospace, and fluid handling systems, this fastener delivers consistent performance where pressure integrity and durability are paramount.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF fine thread with Class 3A precision tolerance for optimal fit. It complies with ASME B18.3, DIN 912, and ISO 4762 standards, ensuring dimensional accuracy and reliability. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming adherence to hazardous substance restrictions.