S-91309A922 1"-8 x 3" ASME B18.2.1, SAE J429 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 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
- Precise Class 2A thread fit for smooth assembly and reduced risk of cross-threading
- External hex drive design allows for high-torque installation with standard tools
- Rockwell B69 hardness provides excellent durability and resistance to wear
- Coarse UNC threading enables faster installation and better performance in softer materials
- Partial threading configuration offers optimal grip strength for specific joint requirements
Professional Applications & Engineering Value
This 1"-8 UNC hex head screw delivers exceptional engineering value for industrial fastening applications where reliability is critical. The high-strength steel construction combined with zinc plating addresses common challenges of structural integrity and environmental corrosion in manufacturing, construction, and heavy equipment applications. The coarse UNC thread provides superior holding power in various materials while the external hex drive enables efficient installation with standard wrenches. With its partial threading and substantial 1½" head width, this fastener ensures secure connections in high-vibration environments, making it ideal for machinery assembly, structural steel connections, and industrial maintenance where 60,000 psi tensile strength is required for safety-critical applications.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 1"-8 UNC coarse threading and partial threading up to 2¼" minimum thread length. Manufactured to ASME B18.2.1 specifications where identified with SAE J429 standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
