S-91268A100 1/4"-20 x 3/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior wear resistance due to Rockwell C33 hardness, extending service life in demanding environments
- Secure fastening with precise thread engagement through Class 2A thread fit and UNC coarse threading
- Easy installation and removal with external hex drive design compatible with standard tools
- Full-length threading ensures maximum grip and uniform stress distribution along the entire fastener
- Compliance with industry standards including ASME B18.2.1 for consistent quality and dimensional accuracy
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for safe usage
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver unmatched reliability in machinery assembly, structural frameworks, and automotive components. The steel construction combined with 150,000 psi tensile strength and Rockwell C33 hardness resists vibration loosening and material fatigue, addressing critical failure points in dynamic load environments. The 1/4"-20 UNC coarse thread provides rapid installation and superior holding power in various materials, while the external hex drive ensures efficient torque application. Fully threaded design maximizes connection integrity, making these ASME B18.2.1 compliant fasteners ideal for applications requiring consistent clamping force and long-term durability.
Specification Summary & Compliance
This Grade 8 hex head screw features precise Class 2A thread fit with 1/4"-20 UNC coarse threading and 3/4" length. Manufactured to ASME B18.2.1 specifications (SAE J429) ensuring dimensional accuracy and performance consistency. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substance management.
