S-91268A133 1/4"-20 x 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 tensile strength of 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Grade 8 steel construction with Rockwell C33 hardness provides superior durability and resistance to wear, extending service life in demanding environments.
- Class 2A thread fit with UNC coarse threading offers easy installation and secure fastening, minimizing assembly time and improving efficiency.
- Partially threaded design allows for precise clamping force control, ideal for applications requiring vibration resistance and joint stability.
- External hex drive and hex head enable straightforward tightening with standard tools, enhancing usability in confined or industrial spaces.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability, supporting reliable engineering specifications.
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence, making these screws suitable for global industrial markets.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in machinery, construction, and automotive sectors where high tensile strength and vibration resistance are paramount. The steel material and Rockwell C33 hardness provide excellent fatigue resistance, reducing maintenance needs in dynamic loads. With a 1/4"-20 UNC coarse thread and partial threading, it ensures secure fastening in materials prone to loosening, while the external hex drive simplifies installation in tight spaces. Ideal for structural assemblies and equipment requiring ASME B18.2.1 compliance, this screw delivers consistent performance under extreme conditions, enhancing operational reliability and safety.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse thread standards for accurate engagement, manufactured in accordance with ASME B18.2.1 and SAE J429 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use.
