S-91268A858 3/4"-10 x 3 1/2" 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 provides superior load-bearing capacity for the most demanding industrial applications
- Grade 8 steel construction with Rockwell C33 hardness ensures maximum durability and resistance to wear under extreme conditions
- Class 2A thread fit with UNC coarse threading enables easier assembly and better vibration resistance in heavy machinery
- Partial threading design offers optimal grip strength while reducing material weight and cost
- External hex drive with 1 1/8" head width provides superior torque transmission and installation efficiency
- Full regulatory compliance with RoHS 3 and REACH ensures environmental safety and global market acceptance
- ASME B18.2.1 specification guarantees precise dimensional accuracy and interchangeability in industrial assemblies
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction equipment, machinery frames, and structural assemblies where high tensile strength is critical. The 3/4"-10 UNC coarse thread configuration provides superior resistance to vibration loosening, while the partial threading design concentrates strength where it's needed most. The external hex drive enables high-torque installation without stripping, and the steel construction with Rockwell C33 hardness ensures long-term reliability in corrosive environments. These ASME B18.2.1 compliant fasteners solve critical bolting challenges in industries requiring predictable, repeatable performance under extreme mechanical stress.
Specification Summary & Compliance
This heavy-duty hex head screw features precise Class 2A thread fit with 3/4"-10 UNC coarse threading and 3 1/2" length with minimum 1 3/4" thread length. 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) environmental regulations for global industrial use.
