S-90019A260 5/16"-18 x 1" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Thread-Locking Hex Head Screws
High-Strength Grade 8 Steel Thread-Locking 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, ideal for high-stress industrial applications
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
- Vibration-resistant locking performance through nylon patch thread locker that maintains integrity from -55° to 250°F
- Premium Grade 8 classification with Rockwell C33 hardness for maximum durability and reliability
- Easy installation and removal with standard external hex drive and UNC coarse threading
- Precise thread engagement with Class 2A fit ensuring consistent performance across applications
- Full threading design provides maximum grip length and uniform stress distribution
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 8 hex head screw delivers critical performance where vibration resistance and structural integrity are paramount. The zinc yellow-chromate plated steel construction provides superior corrosion protection in demanding environments, while the nylon patch thread locker ensures secure fastening despite constant vibration and thermal cycling from -55° to 250°F. The UNC coarse threading with Class 2A fit enables quick installation and reliable performance in construction equipment, machinery assembly, and structural frameworks where high tensile strength and vibration resistance are essential for operational safety and longevity.
Specification Summary & Compliance
This 5/16"-18 hex head screw features precise Class 2A thread fit with UNC coarse threading and full threading along the 1" length. Manufactured to meet ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability. The fastener maintains Grade 8 strength classification with 150,000 psi tensile strength and Rockwell C33 hardness, providing compliance with industrial standards for heavy-duty applications.
