S-91236A892 7/8"-9 x 5" 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
• Coarse UNC threading allows for faster assembly and better performance in softer materials
• External hex drive design enables easy installation and removal with standard tools
• Class 2A thread fit guarantees consistent, precise engagement for secure fastening
• Partial threading offers optimal grip strength while reducing weight and material usage

Professional Applications & Engineering Value

This heavy-duty 7/8"-9 UNC hex head screw delivers exceptional engineering value for demanding industrial applications. The steel construction with zinc plating provides robust corrosion protection in manufacturing, construction, and machinery assembly environments where exposure to moisture and chemicals is common. The coarse thread design ensures rapid installation and superior holding power in structural components, while the external hex drive accommodates high-torque applications without stripping. With partial threading optimizing the strength-to-weight ratio, this fastener solves critical challenges in heavy equipment, infrastructure projects, and industrial machinery requiring reliable, long-term fastening solutions that withstand vibration and dynamic loads.

Specification Summary & Compliance

This 5" length hex head screw features precise Class 2A thread fit with 7/8"-9 UNC coarse threading and meets ASME B18.2.1 specifications under ASTM A307. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while maintaining dimensional accuracy and performance standards.