S-91268A106 1/4"-20 x 1" 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 capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance and durability through Grade 8 steel construction with Rockwell C33 hardness
- Easy installation and removal with standard external hex drive and 7/16" head width for common tool compatibility
- Secure fastening in various materials thanks to coarse UNC 1/4"-20 threading with Class 2A fit for vibration resistance
- Full-length thread engagement provides maximum grip strength across the entire 1" length
- Compliance with major industrial standards including ASME B18.2.1 and SAE J429 for quality assurance
- Environmentally responsible manufacturing meeting RoHS 3 and REACH regulations for global supply chain compatibility
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these Grade 8 hex head screws deliver critical performance where failure is not an option. The 150,000 psi tensile strength and Rockwell C33 hardness ensure reliable operation in heavy machinery, construction equipment, and automotive assemblies subjected to extreme vibrations and dynamic loads. The coarse UNC 1/4"-20 threading with Class 2A fit provides superior resistance to loosening while facilitating quicker installation in various materials. The fully threaded design maximizes surface contact for enhanced clamping force, making these steel hex screws ideal for structural connections, equipment frames, and high-stress fastening applications where durability and reliability are paramount.
Specification Summary & Compliance
This 1/4"-20 x 1" hex head screw features precision UNC coarse threading with Class 2A thread fit per ASME standards, ensuring consistent performance and interchangeability. Manufactured to exacting ASME B18.2.1 and SAE J429 Grade 8 specifications, the fastener delivers guaranteed mechanical properties including 150,000 psi tensile strength. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial applications and supply chain requirements.
