S-91309A673 7/16"-14 x 1 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
• Coarse UNC thread design enables faster installation and reduced cross-threading risk
• External hex drive with 5/8" head width offers secure tool engagement and high torque capability
• Class 2A thread fit guarantees consistent, precision threading for smooth assembly
• Partially threaded shank allows for controlled clamping force in structural applications

Professional Applications & Engineering Value

This 7/16"-14 UNC hex head screw delivers exceptional engineering value for industrial fastening applications where reliability is critical. The steel construction with zinc plating combats corrosion in manufacturing, construction, and machinery assembly environments. Its coarse thread design prevents seizing in high-vibration settings while the external hex drive provides superior torque transmission for secure installations. The partially threaded configuration ensures precise clamping control in structural connections, making it ideal for heavy equipment, frame assembly, and load-bearing applications where joint integrity is paramount.

Specification Summary & Compliance

Manufactured to ASME B18.2.1 specifications with Class 2A thread fit tolerance for precision threading. The screw features 7/16"-14 UNC coarse threads with right-hand direction and meets ASTM A307 material standards. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors.