S-90843A250 1/4"-20 x 1" Cleaned and Bagged 18-8 Stainless Steel Socket Head Screws for High Vacuum

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with silver-plated 18-8 stainless steel construction, ideal for harsh environments and preventing galvanic corrosion.
• Superior tensile strength rated at 70,000 psi for reliable performance in high-stress applications and demanding assemblies.
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash, improving joint integrity and vibration resistance.
• High vacuum compatibility allows use in vacuum systems and cleanrooms without outgassing or contamination risks.
• Durable Rockwell B70 hardness provides excellent wear resistance and maintains thread form under repeated use.
• Easy installation and removal with a standard 3/16" hex drive, enabling efficient torque application in confined spaces.
• Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial components.

Professional Applications & Engineering Value

Engineered for precision and reliability, this silver-plated 18-8 stainless steel socket head cap screw addresses critical challenges in industrial settings. The UNC coarse thread with Class 3A fit delivers consistent clamping force, reducing the risk of loosening in high-vibration machinery, aerospace assemblies, and automated equipment. Its high vacuum rating makes it suitable for semiconductor manufacturing, medical devices, and optical systems where cleanliness and minimal particulate release are paramount. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures long-term durability, while the silver plating enhances electrical conductivity and resists oxidation, extending service life in corrosive or electrically sensitive applications.

Specification Summary & Compliance

This socket head cap screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy. It is fully threaded with a right-hand direction and coarse thread spacing. The product conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring compliance with hazardous substance restrictions and environmental safety requirements.