S-91268A370 3/8"-16 x 3 1/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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
- Exceptional load-bearing capability with 150,000 psi tensile strength for reliable performance in high-stress industrial applications
- Superior wear resistance due to Rockwell C33 hardness, ensuring extended service life and reduced replacement frequency
- Optimized installation efficiency through Class 2A thread fit and coarse UNC threading, providing secure fastening with standard tools
- Maximum thread engagement with full threading along the 3-1/4" length, delivering enhanced grip and vibration resistance
- Robust material integrity using Grade 8 steel construction, engineered to withstand extreme mechanical demands
- Secure drive compatibility featuring an external hex head design for straightforward torque application and minimal slippage
- Regulatory peace of mind with compliance to ASME B18.2.1, RoHS 3, and REACH standards for safe, quality-assured usage
Professional Applications & Engineering Value
Engineered for demanding environments, these Grade 8 hex head screws address critical challenges in machinery assembly, structural frameworks, and heavy equipment manufacturing. The 3/8"-16 UNC coarse thread design ensures rapid installation and robust holding power, reducing the risk of thread stripping under dynamic loads. Made from high-strength steel and featuring a fully threaded shank, these fasteners distribute stress evenly, minimizing point failures in industrial applications. The external hex drive allows for high-torque tightening, making them ideal for applications requiring precise clamping force and durability against vibrations and shock.
Specification Summary & Compliance
This product adheres to Class 2A thread fit tolerances and UNC thread standards, ensuring dimensional accuracy and interchangeability. Manufactured in compliance with ASME B18.2.1 specifications, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming environmental and safety standards are upheld.
