S-94688A323 3/8"-16 x 3" ASME B18.2.1 Square Head Screws

Square Head Screws

0842FA00120 Square Head Screws
0842FA00120 Square Head Screws

Image may differ from product. See technical specification for details.

Part No.
Part No. 0842FA00120
Equivalent to mcmaster :
94688A323

Basic Information

System of Measurement Inch

Head Parameters

Fastener Head Type Square
Head Width 9/16"
Head Height 1/4"

Dimensions

Length 3"

Thread Parameters

Thread Type UNC
Thread Size 3/8"-16
Thread Diameter 0.375"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Unified Standard Class 3A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style External Square

Material & Strength

Material Steel
Finish Zinc Yellow-Chromate Plated
Hardness Not Rated
Fastener Strength Grade/Class SAE Grade 8
Fastener Strength Rating High
Tensile Strength 150000 psi

Temperature & Environment

Specifications Met ASME B18.2.1
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
  • Superior corrosion resistance with zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
  • High-precision Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and safety.
  • Fully threaded UNC coarse pattern allows for quick installation and strong grip in various materials, improving efficiency in demanding setups.
  • External square drive design offers easy torque application with standard tools, reducing installation time and labor efforts.
  • Compliance with ASME B18.2.1 specifications guarantees consistent quality and interoperability, ensuring compatibility in regulated projects.
  • Durable SAE Grade 8 steel construction delivers long-lasting durability under heavy loads, supporting critical machinery and equipment.

Professional Applications & Engineering Value

This 3/8"-16 UNC square head screw is engineered to address common industrial challenges, such as vibration loosening and corrosion-induced degradation. Made from high-strength SAE Grade 8 steel and featuring a zinc yellow-chromate plating, it resists rust and wear in demanding environments like construction, automotive assembly, and heavy machinery. The fully threaded coarse pattern and Class 3A thread fit ensure tight, reliable fastening in materials prone to stress, reducing downtime and enhancing operational safety. Ideal for applications requiring robust, ASME B18.2.1 compliant fasteners, it provides engineering value through consistent performance and extended service life in critical B2B settings.

Specification Summary & Compliance

This screw adheres to precise Unified Standard Class 3A thread dimensions with a 3/8"-16 UNC coarse thread and inch system measurements. It meets ASME B18.2.1 manufacturing specifications, ensuring dimensional accuracy and reliability. The product is designed for high-performance use with a tensile strength of 150,000 PSI and is compliant with industry standards for quality and safety in industrial applications.

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