S-91263A157 10-32 x 5/16" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments.
• Exceptional tensile strength of 130,000 PSI ensures reliable performance under high-stress conditions.
• Precise Class 3A thread fit provides secure, vibration-resistant fastening for critical assemblies.
• Fully threaded design with fine UNF spacing offers maximum grip and uniform load distribution.
• Standard 82° countersink angle allows for a flush, low-profile finish in countersunk holes.
• 1/8" hex drive enables easy installation and removal with standard tools, reducing assembly time.
• Rockwell C39 hardness enhances wear resistance and durability for long-term use.

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered from zinc-plated alloy steel to address common industrial challenges like corrosion, vibration loosening, and high tensile demands. The fine thread spacing and Class 3A fit ensure tight, reliable connections in machinery, automotive, and electronics assemblies, minimizing maintenance needs. The 82° countersink angle and flat head design provide a smooth, secure fit in pre-drilled holes, ideal for applications requiring a flush surface. With 130,000 PSI tensile strength and robust Rockwell C39 hardness, they deliver consistent performance in demanding environments, reducing downtime and replacement costs.

Specification Summary & Compliance

This screw features a 10-32 UNF thread with Class 3A precision fit and fine spacing, ensuring dimensional accuracy per inch system standards. It is manufactured in compliance with ASME B18.3 and ASTM F835 specifications, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe, sustainable use in global markets.