S-91247A644 3/8"-16 x 5" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Optimized torque transmission with external hex drive design for secure installation and removal
• Enhanced durability with Rockwell C25 hardness maintaining structural integrity under repeated stress
• Precision thread engagement with Class 2A UNC coarse threads ensuring consistent fastening performance
• Versatile partial threading allowing both clamping and alignment functions in assembly operations
• Regulatory compliance assurance meeting ASME B18.2.1 and SAE J429 standards for quality and safety

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical engineering solutions where structural integrity matters most. The zinc plated steel construction provides essential corrosion protection for outdoor equipment, machinery frames, and construction applications exposed to environmental elements. The 3/8"-16 UNC coarse thread design ensures rapid installation and superior resistance to vibration loosening in heavy machinery, automotive assemblies, and structural steel connections. With partial threading, engineers benefit from both the clamping force of threaded sections and the alignment stability of unthreaded shanks. The external hex drive accommodates high-torque applications common in industrial maintenance and manufacturing, while the 5" length provides ample engagement for thick material assemblies. These industrial screws are engineered to maintain joint integrity under dynamic loads and thermal cycling, making them ideal for OEM equipment and MRO applications requiring dependable fastening solutions.

Specification Summary & Compliance

This heavy-duty fastener features precision Class 2A thread fit with 3/8"-16 UNC coarse threads and right-hand thread direction. Manufactured to ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability. The product maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to international substance restriction standards for industrial components.