S-91500A318 8-32 x 3/16" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and passivated finish, ideal for harsh environments and extended service life
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B80 hardness for reliable performance under load
• Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit and vibration resistance in assemblies
• Optimal flush mounting featuring an 82° countersink angle and undercut flat head design for seamless, low-profile installations
• Efficient installation with No. 2 Phillips drive providing secure torque transfer and reduced cam-out risk
• Full threading along the 3/16" length for maximum grip and holding power in various material thicknesses
• Compliance with industry standards including ASME B18.6.3, RoHS 3, and REACH for assured quality and environmental safety

Professional Applications & Engineering Value

These 8-32 UNC flat head screws are engineered to address critical challenges in industrial settings where corrosion resistance, mechanical integrity, and precise fit are paramount. The 316 Stainless Steel material, combined with a passivated finish, provides exceptional protection against corrosive agents, making these screws ideal for marine, chemical processing, and outdoor equipment applications. The flat head with undercut profile and 82° countersink angle ensures a flush finish, reducing snag risks and improving aerodynamics in assemblies. With fully threaded coarse UNC threads and Class 2A fit, they offer quick installation and reliable clamping force, minimizing loosening in high-vibration environments. This design is particularly valuable in machinery, electronics enclosures, and structural components where durability and regulatory compliance are non-negotiable.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. Manufacturing and quality are governed by ASME B18.6.3 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of hazardous substances and supporting sustainable procurement practices.