S-91236A630 3/8"-16 x 1 3/4" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B69 hardness provides excellent durability and resistance to wear during installation
• Class 2A thread fit with UNC coarse threading enables faster assembly and reduced cross-threading risks
• External hex drive design allows for high torque application with standard tools
• Partial threading configuration offers optimal grip strength for specific joint requirements
• Comprehensive regulatory compliance ensures meeting international quality and safety standards

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw delivers exceptional engineering value across multiple industrial sectors. The steel construction with zinc plating provides crucial corrosion protection for machinery, structural assemblies, and equipment exposed to harsh environments. The coarse UNC thread design ensures rapid installation in steel frameworks, automotive components, and construction applications where vibration resistance is critical. With partial threading, engineers can precisely control clamping force in bolted joints, preventing loosening in high-stress applications. The external hex drive accommodates standard wrenches for efficient maintenance and disassembly in confined spaces. These industrial hex screws solve common fastening challenges by combining dimensional accuracy with material strength, making them ideal for assembly lines, metal fabrication, and heavy equipment manufacturing where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting ASME B18.2.1 specifications with Class 2A thread fit tolerances ensuring consistent performance. The UNC coarse thread (3/8"-16) with minimum 1" thread length provides secure fastening in various materials. This hex head screw meets ASTM A307 material standards and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial applications requiring verified material safety and performance standards.