S-91247A334 7/16"-20 x 5" 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 strength and durability with Grade 5 steel construction and 120,000 psi tensile strength, ideal for heavy-duty industrial applications.
- Superior corrosion resistance from zinc plating, extending service life in harsh environments.
- Reliable fine thread engagement with 7/16"-20 UNF threads and Class 2A fit, ensuring precise, vibration-resistant connections.
- Easy installation and removal using standard wrenches on the 5/8" external hex head, reducing assembly time.
- Optimized load distribution with partial threading and 1 1/8" minimum thread length, minimizing stress concentration.
- Consistent performance and compatibility meeting ASME B18.2.1 and SAE J429 standards for dependable fastening solutions.
- Environmentally compliant design adhering to RoHS 3 and REACH regulations, safe for various industries.
Professional Applications & Engineering Value
This Grade 5 steel hex head screw is engineered to address critical challenges in industrial settings, such as vibration loosening and corrosion-induced failure. The UNF fine thread and Class 2A thread fit provide superior holding power in dynamic loads, while the zinc plating offers a protective barrier against moisture and chemicals, enhancing longevity in machinery, construction, and automotive assemblies. With a Rockwell C25 hardness and 120,000 psi tensile strength, it ensures reliable performance in high-stress applications, reducing maintenance needs and downtime. The external hex drive and partially threaded design allow for efficient installation and optimal clamp force distribution, making it a versatile choice for engineers seeking durable, compliant fasteners.
Specification Summary & Compliance
This fastener features precise Class 2A thread fit and UNF fine thread specifications, manufactured in accordance with ASME B18.2.1 and SAE J429 standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and reliability for industrial use.
