S-91253A135 5-40 x 1" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
• High tensile strength of 130,000 PSI ensures reliable performance under heavy loads and vibration
• Precise Class 3A thread fit guarantees secure fastening and reduces assembly errors
• Fully threaded design provides maximum grip and uniform load distribution
• Standard 82° countersink angle allows for flush mounting in various materials
• Hex drive compatibility enables quick installation with common tools, reducing labor time
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance

Professional Applications & Engineering Value

These 5-40 UNC flat head screws are engineered for demanding applications where precision and durability are critical. Made from black-oxide alloy steel, they resist rust and wear in industrial settings like machinery assembly, automotive components, and electronic enclosures. The coarse thread spacing and Class 3A thread fit ensure quick, secure fastening, minimizing the risk of cross-threading. With a fully threaded design and hex drive, they simplify installation in tight spaces, reducing downtime. Ideal for projects requiring ASTM F835 compliance, these screws deliver consistent performance in high-stress environments, enhancing overall assembly reliability.

Specification Summary & Compliance

This screw features a 5-40 UNC thread size with Class 3A thread fit for precise tolerance, ensuring reliable engagement. It meets ASTM F835 specifications for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in industrial use.