S-92865A603 5/16"-18 x 4 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Superior corrosion resistance provided by the zinc plating, extending the service life of the screw in various industrial environments.
- High hardness rating of Rockwell C25 enhances wear resistance, maintaining thread integrity through repeated use.
- Coarse UNC threading allows for quicker installation and better performance in materials where fine threads might strip.
- Class 2A thread fit offers a balance between easy assembly and secure fastening, minimizing cross-threading issues.
- External hex drive design enables high torque application with standard tools, ensuring tight and secure connections.
- Full threading along the 4 1/2" length provides maximum grip and adjustability in a wide range of material thicknesses.
Professional Applications & Engineering Value
This Grade 5 steel hex head screw is engineered to address critical fastening challenges in heavy-duty industrial settings. The combination of 120,000 psi tensile strength and Rockwell C25 hardness ensures it can withstand high stress and vibration without deforming or failing. The zinc plating offers a protective barrier against corrosion, making it ideal for outdoor equipment, machinery assembly, and structural applications where moisture or chemicals are present. Its UNC coarse thread and external hex drive facilitate rapid installation in steel frames, construction projects, and automotive components, reducing assembly time while providing a secure, long-lasting hold that meets rigorous industrial demands.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with Class 2A thread fit for precise dimensional accuracy and easy assembly. It is manufactured in accordance with ASME B18.2.1 and SAE J429 specifications, ensuring consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant, meeting environmental regulations for hazardous substance restrictions.
