S-90585A283 10-32 x 5/16" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and chemical exposure
• Precise, reliable fastening ensured by Class 3A thread fit, minimizing the risk of cross-threading and ensuring consistent assembly quality
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness, providing durability under heavy loads and vibration
• Efficient installation and removal using a 1/8" hex drive, allowing for secure tool engagement and reduced slippage
• Enhanced surface durability through passivated finish, improving resistance to wear and extending service life
• Optimal flush mounting with a standard 82° flat head profile, creating a smooth surface finish in countersunk applications
• Full thread engagement along the entire 5/16" length, maximizing grip strength and distribution of clamping force

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered to address critical challenges in industrial fastening where corrosion resistance, precision, and reliability are paramount. Made from 316 Stainless Steel, they excel in aggressive environments such as marine, chemical processing, and food equipment, preventing failure due to rust or chemical attack. The Class 3A thread fit and fine UNF threading ensure tight tolerances, reducing the risk of loosening under vibration and providing consistent performance in high-stress assemblies. The passivated finish further enhances durability, while the hex drive design allows for efficient installation in confined spaces. Ideal for machinery, enclosures, and precision instruments, these screws deliver long-term corrosion resistance and mechanical integrity, minimizing maintenance and downtime.

Specification Summary & Compliance

These screws adhere to ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. The Class 3A thread fit provides precise thread engagement with tight tolerances, while the UNF fine thread design offers superior holding power. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms environmental safety and regulatory adherence, making them suitable for global industrial applications.