S-90019A150 1/4"-20 x 1 1/2" 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
- Vibration-resistant locking performance with nylon patch thread locker that maintains integrity from -55° to 250°F
- Exceptional load-bearing capacity with Grade 8 classification and 150,000 psi tensile strength for heavy-duty applications
- Superior corrosion protection through zinc yellow-chromate plating on steel substrate
- Optimized installation efficiency with external hex drive and UNC coarse threading for rapid assembly
- Precise thread engagement through Class 2A thread fit and controlled partial threading
- Enhanced durability with Rockwell C33 hardness rating for long service life
- Reliable standardization meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
Professional Applications & Engineering Value
This Grade 8 hex head screw with nylon patch thread locker addresses critical vibration-induced loosening in industrial machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plated steel construction provides superior corrosion resistance in harsh environments, while the 150,000 psi tensile strength ensures structural integrity under extreme loads. The 1/4"-20 UNC coarse thread configuration enables quick installation and reliable engagement in various materials, with the partial threading design concentrating strength where needed most. Engineered for industrial fastener applications requiring maintained clamp force despite thermal cycling from -55° to 250°F.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 specifications with Class 2A thread fit tolerance for precise engagement. Features 1/4"-20 UNC coarse threads with minimum 3/4" thread length and external hex drive configuration. The zinc yellow-chromate plating provides corrosion protection while maintaining Grade 8 mechanical properties including 150,000 psi tensile strength and Rockwell C33 hardness. Compliant with industry standards for heavy-duty industrial fasteners.
