S-91286A459 3/4"-10 x 2 1/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
• High hardness rating (Rockwell C33) provides excellent wear resistance and durability under heavy loads and repeated use.
• Coarse UNC threading with Class 2A fit allows for quick, easy installation and secure fastening, even in challenging conditions.
• Full threading design ensures consistent grip along the entire length, offering versatile fastening solutions for various material thicknesses.
• External hex drive and hex head facilitate straightforward installation with standard tools, improving assembly efficiency and reducing labor time.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees precise dimensions and reliable quality for engineering and manufacturing projects.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as construction, machinery assembly, and automotive applications. Made from high-strength steel and featuring a zinc-flake coating, it combats corrosion and wear, ensuring long-term reliability in exposed or high-moisture environments. The UNC coarse thread with Class 2A fit provides robust holding power and ease of installation, reducing the risk of cross-threading and enhancing assembly speed. With a fully threaded design and external hex drive, it offers consistent performance in demanding applications, from structural frameworks to equipment maintenance, delivering superior engineering value by minimizing downtime and maintenance needs.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including Class 2A thread fit and UNC coarse spacing, ensuring compatibility and reliability. It meets ASME B18.2.1 and SAE J429 specifications for quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally responsible use in industrial applications.