S-91309A671 7/16"-14 x 1 1/4" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance in heavy-duty applications without failure
• Rockwell B69 hardness provides excellent durability and resistance to wear during repeated use
• Class 2A thread fit offers consistent assembly ease and secure fastening with standard UNC coarse threads
• External hex drive design allows for quick installation and removal with common tools, reducing labor time
• Full threading along the 1 1/4" length enables versatile grip and adjustment in various material thicknesses
• Compliance with ASME B18.2.1 and ASTM A307 guarantees quality and interoperability in professional settings

Professional Applications & Engineering Value

This 7/16"-14 UNC hex head screw is engineered to address common challenges in industrial assembly, such as vibration loosening and environmental degradation. Made from robust steel and finished with zinc plating, it resists corrosion in harsh conditions, extending service life in machinery, construction, and automotive applications. The coarse thread design and Class 2A fit ensure quick, reliable fastening with minimal risk of cross-threading, while the external hex drive facilitates efficient installation in tight spaces. Ideal for heavy-duty fastening where consistent tensile strength and compliance with standards like ASME B18.2.1 are critical for safety and performance.

Specification Summary & Compliance

This product features precise Class 2A thread fit with UNC coarse threads and dimensions including a 1 1/4" length and 7/16"-14 thread size. It meets ASME B18.2.1 and ASTM A307 specifications for manufacturing consistency. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.