S-91309A720 1/2"-13 x 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
• Class 2A thread fit with UNC coarse threading enables quick assembly and secure fastening in various materials
• External hex drive design allows for high-torque application with standard tools, improving installation efficiency
• Fully threaded construction offers maximum grip length and uniform stress distribution
• Compliance with ASME B18.2.1 and ASTM A307 guarantees consistent quality and interchangeability

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these 1/2"-13 UNC hex head screws provide exceptional reliability in construction, machinery assembly, and structural frameworks. The steel material with zinc plating combats rust and corrosion in humid or outdoor settings, while the coarse thread design ensures strong holding power in wood, metal, and composite materials. With a 60,000 psi tensile strength and Rockwell B69 hardness, they withstand dynamic loads and repetitive stress, reducing maintenance needs. The external hex drive facilitates easy installation with common wrenches, streamlining production lines and minimizing downtime in B2B procurement scenarios.

Specification Summary & Compliance

This hex head screw features a 1/2"-13 UNC thread size with Class 2A thread fit for precise dimensional accuracy per ASME B18.2.1 standards. Manufactured in accordance with ASTM A307 specifications, it ensures consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in global industrial markets.