S-91268A934 1"-8 x 4 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 load-bearing capacity with 150,000 psi tensile strength for reliable performance in demanding applications
- Superior durability and wear resistance thanks to Grade 8 steel construction and Rockwell C33 hardness rating
- Secure fastening with precise thread engagement achieved through Class 2A thread fit and UNC coarse threading
- Easy installation and removal with standard 1 1/2" external hex head design for common tool compatibility
- Optimized strength-to-weight ratio through partial threading design that maintains structural integrity
- Compliance with major industry standards including ASME B18.2.1 and SAE J429 for guaranteed quality
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global regulatory acceptance
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment where vibration resistance and high tensile strength are paramount. The 1"-8 UNC coarse thread configuration provides superior holding power in tough materials, while the partially threaded design concentrates strength where needed most. Manufactured from high-grade steel with Rockwell C33 hardness, this fastener withstands extreme loads and repetitive stress in construction, manufacturing, and automotive applications. The external hex drive ensures secure tool engagement during installation, preventing stripping and maintaining torque integrity in high-vibration environments where reliable industrial fastening is non-negotiable.
Specification Summary & Compliance
This 4 1/2" length hex head screw features precise Class 2A thread fit with 1"-8 UNC coarse thread spacing and partial threading. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use across global markets.
