S-91268A229 1 1/4"-7 x 10" 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 tensile strength of 150,000 psi ensures reliable performance under extreme loads and vibrations
- Grade 8 steel construction with Rockwell C33 hardness provides superior durability and resistance to wear
- Partial threading design offers optimal grip strength while reducing weight and material usage
- Coarse UNC threads with Class 2A fit enable faster installation and better resistance to loosening
- Heavy-duty 1 7/8" hex head with external drive allows for high-torque application with standard tools
- Full regulatory compliance with RoHS 3 and REACH ensures environmental safety and global acceptance
- 10-inch length with 3-inch minimum thread provides versatile fastening solutions for thick materials
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional reliability in construction, machinery assembly, and structural frameworks. The 1 1/4"-7 UNC coarse thread configuration combined with Class 2A thread fit ensures rapid installation and superior vibration resistance, critical in high-stress environments. The partial threading design concentrates strength where needed most, while the external hex drive accommodates high-torque tools for secure fastening. Manufactured from high-strength steel with Rockwell C33 hardness, these screws withstand extreme conditions without compromising integrity, making them ideal for applications demanding maximum tensile strength and long-term performance.
Specification Summary & Compliance
This heavy-duty hex screw features precise Class 2A thread fit with 1 1/4"-7 UNC coarse threads and partial threading extending minimum 3 inches. Manufactured to ASME B18.2.1 specifications and SAE J429 Grade 8 standards, ensuring dimensional accuracy and mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and substance restrictions.
