S-94688A318 3/8"-16 x 1" ASME B18.2.1 Square Head Screws
Square 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 150,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh industrial environments.
- High-strength SAE Grade 8 classification guarantees consistent quality and durability for demanding mechanical assemblies.
- Precise Class 3A thread fit provides secure, vibration-resistant connections with minimal loosening over time.
- External square drive design allows for high-torque installation and easy removal with standard tools.
- Coarse UNC threading enables quick assembly and superior grip in a variety of materials.
- Full threading along the 1" length offers maximum adjustability and holding power in deep applications.
Professional Applications & Engineering Value
This 3/8"-16 UNC square head screw is engineered to address critical challenges in heavy machinery, construction, and automotive sectors where high tensile strength and corrosion resistance are paramount. The SAE Grade 8 steel construction withstands extreme loads and vibrations, preventing joint failure in dynamic environments. Its zinc yellow-chromate plating provides a durable barrier against rust and chemical exposure, ideal for outdoor or humid conditions. The external square drive and coarse thread design facilitate rapid installation and disassembly, reducing downtime in maintenance and repair operations. Compliant with ASME B18.2.1, this fastener ensures interoperability and safety in standardized assemblies, making it a trusted choice for engineers seeking reliable, industrial-strength fastening solutions.
Specification Summary & Compliance
This product adheres to Unified Standard Class 3A thread fit and UNC coarse thread specifications, ensuring precise dimensional accuracy and compatibility. It meets ASME B18.2.1 manufacturing standards for square head bolts, with a 3/8"-16 thread size and 1" length. The zinc yellow-chromate finish complies with industry requirements for corrosion protection, while the SAE Grade 8 rating confirms high tensile strength up to 150,000 PSI. This screw is suitable for applications demanding rigorous performance and regulatory alignment.
