S-94688A332 5/8"-11 x 2" ASME B18.2.1 Square Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by zinc yellow-chromate plating extends service life in harsh industrial environments.
• Optimized grip and quick installation with UNC coarse threading, ideal for rapid assembly and disassembly in maintenance scenarios.
• Secure torque transmission via the external square drive head, minimizing slippage and ensuring consistent tightening.
• High-precision thread fit with Unified Standard Class 3A ensures tight, secure connections with minimal vibration loosening.
• Full threading design allows for maximum engagement along the entire length, enhancing load distribution and joint integrity.
• Compliance with ASME B18.2.1 specifications guarantees dimensional accuracy and interchangeability for professional use.

Professional Applications & Engineering Value

This SAE Grade 8 square head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assembly, where high tensile strength and durability are paramount. The steel material combined with zinc yellow-chromate plating offers robust protection against rust and chemical exposure, making it suitable for outdoor or corrosive settings. Its UNC coarse thread and external square drive facilitate efficient installation with standard tools, reducing labor time while maintaining a secure fit under dynamic loads. Ideal for structural fastening, equipment frames, and high-vibration environments, this screw ensures long-term reliability and meets rigorous industrial fastener standards, supporting seamless integration into ASME B18.2.1-compliant systems.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Unified Standard Class 3A thread fit for tight tolerances and UNC coarse threading with a 5/8"-11 size. It complies with ASME B18.2.1 specifications for square head bolts, ensuring consistency in industrial applications. The zinc yellow-chromate finish meets common corrosion resistance requirements, while the material and design support high-strength use without specific hardness ratings. RoHS and REACH compliance should be verified per supplier data for environmental safety.