S-91571A266 5/8"-11 x 2" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications

Key Features & Benefits at a Glance

• Exceptional structural integrity with 120,000 PSI tensile strength for reliable performance in heavy-load applications
• Superior hardness rating of Rockwell C19 ensures excellent wear resistance and long-term durability
• Precision UNC coarse threading with Class 2A fit provides secure fastening and easier installation in structural applications
• Optimized partial threading design combines the strength of full shank with the adjustability of threaded engagement
• Heavy-duty external hex drive with 1 1/16" head width delivers maximum torque transmission and installation efficiency
• Full regulatory compliance including RoHS 3 and REACH ensures environmental responsibility and global market acceptance
• Proven industry standards meeting ASME B18.2.6, ASTM A325, and ASTM F3125 for consistent quality and performance

Professional Applications & Engineering Value

This Grade A325 structural bolt is engineered to address critical challenges in heavy construction and industrial applications where joint integrity is paramount. The steel construction combined with 120,000 PSI tensile strength provides exceptional resistance to dynamic loads and vibration, making it ideal for structural steel connections, bridge construction, and heavy machinery assembly. The UNC coarse thread design ensures rapid installation while maintaining superior clamping force, and the partial threading configuration concentrates strength where it's needed most. The external hex drive accommodates standard tools for efficient installation in confined spaces, while the Rockwell C19 hardness guarantees long-term performance even in corrosive industrial environments.

Specification Summary & Compliance

This 5/8"-11 hex head screw features precise Class 2A thread fit with UNC coarse threading and 1 1/4" thread length on a 2" overall length. Manufactured to exacting ASME B18.2.6 dimensional standards with material properties conforming to ASTM A325 and ASTM F3125 specifications. The fastener is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility and regulatory acceptance for global industrial applications.