S-90002A106 1/4"-20 x 1 1/2" 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
- Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
- Enhanced corrosion resistance from zinc yellow-chromate plating, extending service life in harsh environments
- Superior hardness rating of Rockwell C33 prevents deformation under extreme pressure
- Reliable coarse threading (UNC) ensures quick assembly and secure fastening in various materials
- Full-threaded design provides consistent grip strength along the entire 1-1/2" length
- Precision Class 2A thread fit guarantees smooth installation and optimal engagement
- Heavy-duty Grade 8 certification meets rigorous industrial standards for high-stress applications
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional performance in demanding industrial settings where failure is not an option. The combination of high-strength steel and zinc yellow-chromate plating creates a durable fastener capable of withstanding extreme vibration, heavy loads, and corrosive environments. The UNC coarse threading provides superior pull-out resistance in soft materials while maintaining quick installation times. Ideal for heavy machinery, structural steel connections, and automotive assemblies, these fully threaded screws distribute clamping force evenly across the entire engagement length. The external hex drive design allows for high-torque installation, making them perfect for applications requiring precise preload measurements and reliable, repeatable fastening performance in critical engineering systems.
Specification Summary & Compliance
Manufactured to exacting ASME B18.2.1 and SAE J429 specifications, these hex head screws feature precision Class 2A thread fit with 1/4"-20 UNC coarse threading. The fasteners maintain dimensional accuracy throughout the 1-1/2" length with consistent external hex drive geometry. Compliance with industrial standards ensures reliable performance in heavy-duty applications, while the zinc yellow-chromate plating meets corrosion resistance requirements for various operating environments. The Grade 8 classification guarantees mechanical properties including the specified 150,000 psi tensile strength and Rockwell C33 hardness for superior durability.
