S-94705A429 3/4"-10 x 3 1/2" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Exceptional tensile strength of 125,000 PSI ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• High hardness rating (Rockwell C35) provides superior resistance to wear and deformation, extending service life in demanding environments.
• Coarse UNC threading offers faster installation and better debris resistance compared to fine threads, improving efficiency in industrial settings.
• Class 2A thread fit guarantees consistent, precise engagement with nuts for secure fastening without binding or cross-threading issues.
• Partial threading design allows for controlled clamping force distribution, ideal for applications requiring specific grip length (1 3/4").
• External hex drive enables high-torque application with standard tools, facilitating quick assembly and disassembly in confined spaces.
• ASTM A193 Grade B7 compliance ensures material integrity and performance consistency for high-temperature and high-pressure services.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade B7 hex head screw addresses critical challenges in machinery, construction, and pressure vessel assembly. The ASTM A193 steel composition, combined with 125,000 PSI tensile strength and Rockwell C35 hardness, provides exceptional resistance to stress corrosion and thermal cycling. The 3/4"-10 UNC coarse thread ensures rapid installation even in dirty or vibratory environments, while the partial threading optimizes load distribution across the 1 3/4" grip length. This external hex drive fastener is ideal for bolting flanges, structural steel, and heavy equipment where reliability under sustained tension is paramount.

Specification Summary & Compliance

This hex head screw features a 3/4"-10 UNC thread with Class 2A fit for standard inch-system compatibility and precise assembly. Manufacturing adheres to ASTM A193 Grade B7 specifications, ensuring consistent material properties and performance. The screw meets common industry standards for high-strength fasteners, with dimensions including a 1 1/4" head width, 15/32" head height, and overall 3 1/2" length. Compliance with RoHS and REACH is typical for steel fasteners, supporting use in regulated industrial and construction sectors.