S-91247A490 3/4"-16 x 7 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced load-bearing capacity with Grade 5 steel construction and 120,000 psi tensile strength for reliable performance in demanding applications.
• Superior corrosion resistance provided by zinc plating, extending service life in harsh industrial environments.
• Precise thread engagement with 3/4"-16 UNF fine threading and Class 2A fit, ensuring secure fastening and vibration resistance.
• Optimized torque application through the external hex drive and 1 1/8" head width, allowing for easy installation with standard tools.
• Reduced material stress from the partially threaded design and Rockwell C25 hardness, minimizing the risk of shear failure.
• Compliance with industry standards including ASME B18.2.1 and SAE J429, guaranteeing consistent quality and interchangeability.
• Environmental and safety adherence with RoHS 3 and REACH compliance, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

This 3/4"-16 UNF Grade 5 hex head screw is engineered to address critical fastening challenges in heavy-duty industrial settings, such as machinery assembly, structural frameworks, and automotive systems. The zinc plated steel material offers excellent corrosion resistance, reducing maintenance needs in humid or corrosive environments. With a fine thread design and Class 2A thread fit, it provides superior clamping force and vibration resistance, preventing loosening under dynamic loads. The partially threaded shank concentrates strength where needed, while the external hex drive ensures efficient torque transfer during installation. Ideal for applications requiring high tensile strength and durability, this screw delivers reliable performance in construction, manufacturing, and equipment maintenance, minimizing downtime and enhancing operational safety.

Specification Summary & Compliance

This fastener adheres to precise dimensional tolerances, including a Class 2A thread fit and UNF fine threading standards, ensuring consistent performance and compatibility. It meets ASME B18.2.1 and SAE J429 specifications for Grade 5 bolts, with a tensile strength of 120,000 psi and Rockwell C25 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental safety and regulatory requirements in global markets.