S-92620A255 3/4"-16 x 2 1/4" 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 strength and durability with Grade 8 classification, ensuring reliable performance in high-stress applications and a tensile strength of 150,000 psi.
- Superior corrosion resistance provided by the zinc yellow-chromate plating, extending service life in harsh industrial environments.
- Precise and secure fastening thanks to the UNF fine thread and Class 2A thread fit, reducing the risk of loosening under vibration.
- Easy installation and removal with the external hex drive and hex head design, allowing for high torque application with standard tools.
- Optimized thread engagement through partial threading, providing strong holding power while minimizing material usage and weight.
- High hardness rating of Rockwell C33, offering excellent wear resistance and reduced deformation under load.
- Compliance with industry standards including ASME B18.2.1 and SAE J429, ensuring consistent quality and interoperability.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for demanding industrial applications where failure is not an option. Constructed from high-strength steel and finished with a zinc yellow-chromate plating, it combats corrosion in environments exposed to moisture, chemicals, and outdoor elements. The UNF fine thread and Class 2A thread fit provide superior vibration resistance and precise alignment, critical in machinery, heavy equipment, and structural assemblies. Its partial threading ensures that the unthreaded shank bears shear loads effectively, making it ideal for securing components that experience dynamic stresses. This fastener delivers reliable, long-term performance in construction, automotive, and manufacturing sectors, reducing maintenance needs and downtime.
Specification Summary & Compliance
This screw features a 3/4"-16 UNF thread with a Class 2A fit for precise dimensional accuracy. It is manufactured in accordance with ASME B18.2.1 and SAE J429 standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial markets.
