S-91309A723 1/2"-13 x 2 3/4" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating for extended service life in demanding environments
• High tensile strength of 60,000 PSI ensures reliable performance under heavy loads and vibration
• Coarse UNC threading provides faster installation and reduced cross-threading risk
• External hex drive design allows for high-torque application with standard tools
• Full threading along the 2 3/4" length offers maximum grip and adjustability
• Class 2A thread fit guarantees consistent, precision mating with nuts and tapped holes
• Compliance with major industrial standards including ASME B18.2.1 ensures quality and interchangeability

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw delivers exceptional value in industrial assembly and heavy machinery applications where joint integrity is critical. The steel construction with zinc plating combats rust and corrosion in humid or outdoor settings, while the coarse UNC thread resists loosening under dynamic loads. Its external hex drive accommodates high torque values during installation, making it ideal for structural steel connections, equipment frames, and conveyor systems requiring 60,000 PSI tensile strength. The fully threaded design ensures uniform stress distribution across the entire 2 3/4" length, preventing premature failure in vibration-prone environments.

Specification Summary & Compliance

Manufactured to ASME B18.2.1 and ASTM A307 specifications with Class 2A thread fit for precise dimensional accuracy. Features Rockwell B69 hardness and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards for safe industrial use.