S-91236A740 1/2"-13 x 8" 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 harsh 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
• External hex drive design allows for easy installation and removal with standard tools
• Class 2A thread fit guarantees precise, secure fastening with consistent engagement
• Partially threaded shank offers optimal clamping force distribution for structural applications
• Compliance with ASME B18.2.1, RoHS 3, and REACH ensures safety, quality, and environmental standards are met

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw is engineered for demanding industrial applications where reliability and strength are critical. The high-strength steel construction, combined with zinc plating, provides exceptional corrosion resistance, making it ideal for outdoor machinery, construction frameworks, and heavy equipment assembly. The coarse UNC thread and partial threading design prevent loosening under dynamic loads, while the external hex drive ensures quick, secure fastening with common tools. These features address common engineering challenges such as joint integrity, environmental degradation, and installation efficiency, delivering long-term performance in structural and mechanical systems.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for precise tolerance and reliable engagement. It meets ASME B18.2.1 manufacturing specifications under ASTM A307, ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial sectors without hazardous substances.