S-91247A235 3/8"-24 x 4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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
- Superior tensile strength of 120,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Zinc plating provides excellent corrosion resistance, extending service life in harsh environments and minimizing maintenance needs.
- Fine UNF threading with Class 2A fit offers precise, secure fastening with reduced vibration loosening for stable assemblies.
- Grade 5 steel construction with Rockwell C25 hardness delivers optimal durability and resistance to wear under heavy loads.
- External hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency.
- Partial threading provides unthreaded shank strength where needed, ideal for applications requiring clamping force.
- Compliance with ASME, SAE, RoHS 3, and REACH standards ensures consistent quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to address critical fastening challenges in heavy-duty industrial applications, such as machinery assembly, structural frameworks, and automotive components. The 3/8"-24 UNF fine thread and Class 2A thread fit provide superior grip and vibration resistance, preventing loosening in dynamic environments. Made from high-strength steel with a zinc-plated finish, it combats corrosion and wear, ensuring long-term reliability. The external hex drive facilitates quick installation with common tools, reducing labor time. Ideal for use where 120,000 psi tensile strength and Rockwell C25 hardness are required, this screw offers a dependable solution for engineers seeking durability and compliance with industry standards like ASME B18.2.1 and SAE J429.
Specification Summary & Compliance
This screw features a 3/8"-24 UNF fine thread with Class 2A thread fit for precise dimensional accuracy, ensuring consistent performance. It meets ASME B18.2.1 and SAE J429 specifications for Grade 5 fasteners, with a tensile strength of 120,000 psi and Rockwell C25 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and adherence to global standards.
