S-94688A316 5/16"-18 x 1 1/4" 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 rated at 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 or outdoor environments, minimizing maintenance needs.
- Secure fastening with UNC coarse threads provides quick installation and strong holding power in a variety of materials, improving assembly efficiency.
- Precise Class 3A thread fit ensures consistent engagement and vibration resistance, enhancing joint integrity in dynamic loads.
- External square drive design allows for high-torque application with standard tools, reducing slippage and tool wear during installation.
- Full threading along the 1-1/4" length offers versatile grip depth and adjustment flexibility, accommodating various material thicknesses.
- Compliance with ASME B18.2.1 specifications guarantees industrial-grade quality and interchangeability, supporting standardized procurement and safety.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this SAE Grade 8 square head screw combines high-strength steel and zinc yellow-chromate plating to address common challenges like corrosion and mechanical stress. Its UNC coarse thread spacing and Class 3A fit ensure rapid, secure fastening in heavy machinery, construction frameworks, and automotive assemblies, where vibration resistance is critical. The external square drive facilitates easy installation with standard wrenches, reducing assembly time and improving reliability in maintenance-intensive environments. Ideal for applications requiring 150,000 psi tensile strength, it supports long-term durability and compliance with ASME B18.2.1 standards, making it a trusted choice for engineers prioritizing safety and performance.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with Class 3A fit for precise dimensional accuracy, and is fully threaded for consistent performance. Manufactured from steel with a zinc yellow-chromate finish, it meets ASME B18.2.1 specifications, ensuring adherence to industrial standards for quality and reliability.
