S-91253A006 10-32 x 5/8" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Black-oxide finish on alloy steel provides enhanced corrosion resistance and a durable, non-reflective surface suitable for demanding environments.
• Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant connections in machinery and equipment.
• Fully threaded design allows for maximum grip and holding power along the entire length, ideal for components requiring uniform clamping force.
• 82° countersink angle and flat head enables flush mounting, minimizing protrusion for a clean, aerodynamic finish in assembled products.
• Hex drive style (1/8") facilitates easy installation and removal with standard tools, improving assembly efficiency and reducing labor time.
• Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, providing peace of mind for global sourcing.

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered to address common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction, combined with a Rockwell C39 hardness, delivers outstanding durability and resistance to wear in heavy-duty applications like machinery assembly, automotive components, and electronic enclosures. The fine thread spacing and Class 3A thread fit provide superior engagement in pre-tapped holes, reducing the risk of cross-threading and ensuring long-term reliability. Ideal for use in aerospace, manufacturing, and construction sectors, these screws offer a flush-mounted solution that maintains structural integrity while meeting rigorous ASME B18.3 and ASTM F835 specifications for consistent performance.

Specification Summary & Compliance

This product features precise Class 3A thread fit with UNF fine threading and a standard 82° countersink angle for optimal seating. Dimensions include a 5/8" length, 10-32 thread size, and hex drive (1/8") for compatibility with common tools. It complies with ASME B18.3 and ASTM F835 manufacturing standards, ensuring dimensional accuracy and performance consistency. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.