S-91309A630 3/8"-16 x 1 3/4" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength 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
- Superior corrosion protection with zinc plating that extends service life in harsh industrial environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B69 hardness provides excellent resistance to wear and deformation during installation
- Class 2A thread fit offers optimal balance between easy assembly and secure fastening
- Fully threaded design maximizes grip length and load distribution across the entire fastener
- External hex drive enables high-torque installation with standard tools for efficient assembly
- Coarse UNC threading allows for quicker installation and better performance in softer materials
Professional Applications & Engineering Value
These 3/8"-16 UNC hex head screws deliver exceptional engineering value for demanding industrial applications where reliability is critical. Manufactured from ASTM A307 steel with zinc plating, they provide superior corrosion resistance for machinery, structural steel connections, and heavy equipment assemblies. The coarse thread design ensures rapid installation in various materials while maintaining secure fastening. With 60,000 psi tensile strength and Rockwell B69 hardness, these fully threaded screws withstand significant vibration and load stresses, making them ideal for construction, manufacturing, and automotive applications where joint integrity is paramount. The external hex drive facilitates high-torque installation with common tools, streamlining assembly processes in production environments.
Specification Summary & Compliance
This 1-3/4" hex head screw features 3/8"-16 UNC coarse threads with Class 2A thread fit for precise dimensional accuracy. Manufactured in compliance with ASME B18.2.1 specifications using ASTM A307 steel, ensuring consistent quality and performance. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, confirming environmental responsibility and regulatory adherence for global industrial applications.
