S-91247A482 3/4"-16 x 3 3/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure
• Zinc plated steel construction provides superior corrosion resistance, extending service life in harsh industrial environments
• Grade 5 classification guarantees consistent mechanical properties and reliable performance in medium-duty to heavy-duty applications
• Fine UNF threading offers improved vibration resistance and better torque control compared to coarse threads
• Class 2A thread fit ensures easy assembly while maintaining proper engagement and load distribution
• External hex drive design allows for high torque application with standard tools, simplifying installation and removal
• Partial threading provides optimal grip length while allowing for unthreaded shank strength where needed

Professional Applications & Engineering Value

This 3/4"-16 UNF Grade 5 hex head screw delivers exceptional engineering value through its zinc plated steel construction and precision fine threading. The combination of 120,000 psi tensile strength and Rockwell C25 hardness makes it ideal for structural applications where vibration resistance and load-bearing capacity are critical. The external hex drive configuration enables high-torque installation in confined spaces, while the Class 2A thread fit ensures consistent engagement without binding. These heavy-duty hex bolts are engineered to solve common industrial fastening challenges, including equipment assembly, machinery maintenance, and structural frameworks where reliability under stress is paramount. The partial threading design provides maximum strength in the shank while maintaining secure thread engagement.

Specification Summary & Compliance

This hex head screw features precise 3/4"-16 UNF fine threading with Class 2A thread fit tolerance for optimal assembly performance. Manufactured to ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical consistency. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications. With dimensions of 3 3/4" length and 1 1/8" head width, this inch fastener maintains strict adherence to industrial standards for reliable performance.