S-91309A882 7/8"-9 x 2 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 for extended service life in harsh industrial environments
• Exceptional 60,000 PSI tensile strength provides reliable performance in heavy-duty applications
• Class 2A thread fit ensures easy assembly while maintaining secure fastening integrity
• Coarse UNC threading enables quick installation and reduced cross-threading risks
• External hex drive design allows for high-torque application with standard tools
• Full threading along 2½" length provides maximum grip and adjustment flexibility
• Rockwell B69 hardness maintains structural integrity under repeated stress and vibration

Professional Applications & Engineering Value

This heavy-duty hex head screw delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The steel construction with zinc plating combats corrosion in industrial settings, while the 7/8"-9 UNC coarse thread provides superior holding power in construction, machinery assembly, and structural applications. The external hex drive accommodates high torque requirements, making it ideal for bolted connections requiring precise clamping force. Engineered to withstand extreme conditions, this fully threaded fastener ensures uniform stress distribution across the entire length, preventing joint failure in critical infrastructure and heavy equipment applications.

Specification Summary & Compliance

Manufactured to exacting Class 2A thread fit tolerances with UNC coarse thread spacing (7/8"-9). Complies with ASME B18.2.1 specifications and manufactured from ASTM A307 steel. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features right-hand threading, 2½" length, and full threading for consistent performance across industrial applications.