S-90332A112 4-40 x 5/16" High-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and extended service life.
• Exceptional strength and durability from a 70,000 psi tensile strength and Rockwell B84 hardness, preventing stripping and failure under high stress.
• Precise and secure fastening ensured by the Class 3A thread fit, offering tighter tolerances for high-vibration applications.
• Reliable drive engagement with the 3/32" hex drive and high-profile socket head, allowing for high torque application and reducing cam-out.
• Broad compatibility and easy installation from the 4-40 UNC coarse thread, which is common and resists cross-threading.
• Versatile fully threaded design for consistent holding power along the entire 5/16" length, accommodating various material thicknesses.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safety and regulatory acceptance for international projects.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Socket Head Cap Screw is engineered to solve critical challenges in precision assembly and machinery. Its high-strength 70,000 psi rating and Class 3A thread fit provide a secure, vibration-resistant connection essential for aerospace, automotive, and electronics enclosures where loosening can lead to catastrophic failure. The corrosion-resistant material ensures long-term reliability in humid or chemically aggressive environments, reducing maintenance and replacement costs. The 3/32" hex drive and high-profile socket head allow for compact installations in tight spaces, while the 4-40 UNC coarse thread facilitates quick assembly without sacrificing holding power. This combination of durability, precision, and environmental compliance makes it a trusted choice for OEMs and maintenance teams demanding performance and regulatory adherence.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A fit for high precision. Dimensions follow the inch system, including a 5/16" length and 3/32" hex drive. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of restricted hazardous substances for global industrial use.