S-90608A322 1/4"-20 x 7/8" ASME B18.3, DIN 912, ISO 4762 Sealing Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life.
• Reliable high-pressure sealing up to 1500 psi, preventing leaks in critical fluid and gas systems.
• Exceptional thread engagement and precision with Class 3A UNC coarse threads for secure, vibration-resistant fastening.
• Broad temperature compatibility from -40° to 225° F, thanks to the Buna-N rubber O-ring, ensuring performance in varied operating conditions.
• High tensile strength of 100,000 psi and Rockwell B85 hardness for demanding mechanical loads and durability.
• Secure hex socket drive allows for high torque application and easy installation in confined spaces.
• Full compliance with major international standards including ASME B18.3, DIN 912, and ISO 4762, ensuring interchangeability and quality.

Professional Applications & Engineering Value

This 316 stainless steel socket head cap screw is engineered to address critical challenges in industrial assembly, where leak prevention and structural integrity are paramount. The inclusion of a Buna-N rubber O-ring provides an effective seal against fluids and gases, making it ideal for high-pressure applications in hydraulic systems, pumps, and compressors. The UNC coarse threading with Class 3A fit ensures quick assembly and superior resistance to loosening under vibration, reducing maintenance needs. Its high tensile strength and corrosion-resistant material make it suitable for marine, chemical processing, and food industry equipment, offering long-term reliability and compliance with stringent industry specifications.

Specification Summary & Compliance

This socket head cap screw features precise 1/4"-20 UNC threads with Class 3A fit for accurate engagement and is fully threaded for consistent clamping force. It meets ASME B18.3, DIN 912, and ISO 4762 manufacturing standards, ensuring dimensional accuracy and performance. The product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmental and safety regulations for global industrial use.