S-94705A218 1/2"-13 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 in high-stress industrial applications, reducing failure risks
• Grade B7 steel construction with Rockwell C35 hardness provides superior durability and resistance to wear in demanding environments
• External hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency
• Class 2A thread fit with UNC coarse threading offers quick assembly and better resistance to vibration loosening in machinery
• Partially threaded shank with 2 1/4" grip length ensures secure fastening in thick materials, minimizing slippage
• ASTM A193 compliance guarantees consistent quality and material standards for critical high-temperature and pressure applications
• Robust 7/8" hex head provides ample torque application surface, preventing tool slippage during tightening

Professional Applications & Engineering Value

This high-strength hex head screw delivers critical performance in demanding industrial settings where reliability is paramount. Engineered from Grade B7 steel with 125,000 psi tensile strength, it withstands extreme pressures and temperatures in pressure vessel systems, valve assemblies, and structural machinery. The UNC coarse thread configuration ensures rapid installation while maintaining vibration resistance, significantly reducing maintenance downtime. With partial threading and substantial grip length, it provides secure clamping force across multiple material thicknesses. The external hex drive design accommodates standard wrenching tools, facilitating quick serviceability in confined spaces. These engineering features make it ideal for construction, oil and gas, and heavy equipment applications requiring ASTM A193 certified fasteners.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances per UNC standards, ensuring precise thread engagement. Manufacturing complies with ASTM A193 specification for high-temperature service. The inch system measurements include 1/2"-13 UNC thread size with coarse thread spacing, 3 1/2" overall length, and 1 1/4" thread length. Material certification confirms Grade B7 steel composition with Rockwell C35 hardness verification. The product meets industry standards for heavy-duty industrial applications requiring verified mechanical properties and dimensional consistency.