S-90002A103 1/4"-20 x 3/4" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification
High-Strength Steel Hex Head Screws with Material Certification
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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
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh environments
- Optimized thread engagement with UNC coarse threading providing faster installation and superior vibration resistance
- Maximum hardness durability with Rockwell C33 rating ensuring minimal wear and deformation under heavy loads
- Precise industrial compatibility through Class 2A thread fit guaranteeing consistent performance in assembly operations
- Enhanced drive stability with external hex head design allowing high torque application without stripping
- Full-threaded versatility enabling complete engagement along the entire 3/4" length for adjustable clamping force
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where failure is not an option. The steel construction with zinc yellow-chromate plating combats corrosive elements in manufacturing facilities, outdoor applications, and high-moisture environments. The 1/4"-20 UNC coarse thread configuration ensures rapid installation while maintaining superior holding power, significantly reducing assembly time in production lines. With fully threaded design and external hex drive, maintenance crews can achieve precise tension control and easy access in confined spaces. These heavy-duty hex screws are engineered to withstand extreme vibrational forces and dynamic loads common in automotive, construction, and industrial machinery applications.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with UNC coarse thread specifications ensuring consistent performance across industrial applications. Complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. The zinc yellow-chromate plating meets industry corrosion resistance requirements while the Grade 8 classification guarantees 150,000 psi minimum tensile strength and Rockwell C33 hardness for demanding service conditions.
