S-91099A362 10-32 x 5/8" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ensuring longevity in harsh industrial environments.
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under high-stress conditions.
• Precise thread engagement thanks to the Class 2A thread fit and UNF fine thread spacing, reducing the risk of cross-threading and ensuring secure fastening.
• Efficient installation and flush finish with the Phillips No. 2 drive and 82° undercut flat head, allowing for easy driving and a smooth surface profile.
• Full threading for maximum grip across the entire 5/8" length, providing consistent holding power in various material thicknesses.
• Compliance with major industry standards including ASME B18.6.3, ensuring dimensional accuracy and interoperability in professional applications.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

This 10-32 UNF flat head screw is engineered to address critical challenges in industrial assembly, where corrosion resistance, precise fit, and high tensile strength are paramount. The passivated 18-8 stainless steel material provides excellent protection against rust and chemical exposure, making it ideal for use in machinery, electronics, and outdoor equipment. The flat head with undercut profile and 82° countersink angle ensures a flush mount, reducing protrusion risks and improving aerodynamic or aesthetic surfaces. Combined with the Phillips drive and fine thread spacing, it offers quick, secure installation in tight-tolerance applications, minimizing assembly time and enhancing structural integrity. These features make it a reliable choice for engineers seeking durable, compliant fasteners for demanding environments.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit and UNF (Unified National Fine) thread standards, ensuring precise dimensional accuracy and compatibility. It meets the ASME B18.6.3 specification for machine screws and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. The manufacturing process guarantees consistent performance in line with industrial quality requirements.