S-91247A634 3/8"-16 x 2 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- High tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Zinc plating provides excellent corrosion resistance, extending service life in various environmental conditions.
- Grade 5 steel construction with Rockwell C25 hardness offers superior durability and resistance to wear.
- UNC coarse threading allows for quicker installation and better performance in softer materials or where vibration is a concern.
- External hex drive design enables easy installation and removal with standard tools, improving assembly efficiency.
- Class 2A thread fit ensures consistent, reliable engagement with mating parts for secure fastening.
- Partial threading provides an unthreaded shank for enhanced shear strength and precise clamping force distribution.
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw is engineered to address critical industrial fastening challenges. The Grade 5 steel material, combined with zinc plating, delivers exceptional resistance to corrosion and environmental degradation, making it ideal for outdoor equipment, machinery, and structural assemblies. The coarse UNC threading ensures rapid installation and superior performance in applications prone to vibration loosening, while the partial threading design maximizes clamping force and prevents joint failure. Meeting ASME B18.2.1 and SAE J429 standards, this fastener provides reliable performance in automotive, construction, and heavy equipment applications where high-strength fastening solutions are essential for safety and longevity.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with UNC coarse threading (3/8"-16) and a minimum thread length of 1". Manufactured to ASME B18.2.1 and SAE J429 specifications, it ensures dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and regulatory adherence for industrial use.
