S-90175A111 3/4"-10 x 1 3/4" ASTM A490, ASTM F3125 High-Strength Steel Heavy Hex Head Screws for Structural Applications

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in the most demanding structural and heavy-duty applications
• Superior hardness rating (Rockwell C38) provides excellent resistance to wear, deformation, and shear forces over extended service life
• ASTM Grade A490 compliance guarantees consistent quality and performance for critical structural connections in construction and industrial settings
• Coarse UNC threading with Class 2A fit enables faster installation and superior vibration resistance compared to fine-thread alternatives
• Partially threaded design allows for precise clamping force distribution and improved joint stability
• External hex drive configuration facilitates easy installation with standard tools while providing high torque capability
• Environmental compliance with RoHS 3 and REACH regulations ensures safe usage across various industrial sectors

Professional Applications & Engineering Value

These high-strength hex head screws deliver exceptional engineering value in structural steel connections, heavy machinery assembly, and critical infrastructure projects. The ASTM Grade A490 steel construction combined with Rockwell C38 hardness addresses common failure points in high-stress applications by providing superior resistance to fatigue and impact loads. The 3/4"-10 UNC coarse threading with Class 2A fit ensures reliable engagement even in challenging field conditions, while the partial threading design optimizes clamp load distribution across connected members. These structural bolts are engineered to maintain integrity under sustained tensile loads, making them ideal for seismic-resistant structures, bridge construction, and industrial equipment where joint reliability is paramount.

Specification Summary & Compliance

Manufactured to exacting ASTM A490 specifications within ASTM F3125 requirements, these hex head screws feature precision Class 2A thread fit with 3/4"-10 UNC coarse threading. The fasteners maintain dimensional accuracy per inch system standards with 1 3/4" overall length and 1 3/8" thread length. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility, while the 150,000 PSI tensile strength and Rockwell C38 hardness provide verified mechanical performance for critical structural applications.