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Ready To Ship Jfast 3120mh - 5/16-18x1 1/4 Unslotted Indented Hex Head Machine Screw Fully Threaded Zinc, Case Quantity: 1,000 Bundle [QG9bVe4y]

$47.99 $153.99 -69%

High-Quality Machine Screws for Durability and Reliability The JFAST 3120MH is a top-tier machine screw designed for demanding applications where strength and reliability are paramount. This fully threaded screw boasts an unslotted indent hex head, e

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High-Quality Machine Screws for Durability and Reliability

The JFAST 3120MH is a top-tier machine screw designed for demanding applications where strength and reliability are paramount. This fully threaded screw boasts an unslotted indent hex head, ensuring a secure fit and easy installation. With its zinc finish, it offers excellent corrosion resistance, making it ideal for various industrial and mechanical applications. The JFAST 3120MH stands out for its robust construction and superior performance, making it a must-have for any professional looking for a high-quality machine screw.
  • Robust Construction – The fully threaded design ensures maximum strength and durability, providing a reliable fastening solution.
  • Corrosion Resistance – The zinc finish offers excellent protection against rust and corrosion, extending the lifespan of the screw.

Comprehensive Product Specifications

The JFAST 3120MH machine screw features a 5/16-18 thread size and a length of 1 1/4 inches, making it versatile for a wide range of applications. With a hex head style, it is compatible with a variety of driver sizes, ensuring ease of use. The unslotted indent design adds an extra layer of security, preventing the screw from loosening over time. The screw has a head diameter of 1/2 inch and a head height ranging from 0.208 to 0.230 inches, providing optimal contact with the material being fastened. The 1/2-inch width across flats ensures a strong grip, while the full thread length allows for complete engagement with the material.
  • Thread Size – 5/16-18, suitable for a wide range of applications.
  • Length – 1 1/4 inches, offering versatility and adaptability.

Practical Applications and Target Audience

The JFAST 3120MH machine screw is an excellent choice for professionals in industries such as construction, automotive, and manufacturing. Its robust construction and corrosion resistance make it ideal for fastening heavy-duty components, ensuring long-lasting performance. Whether you are building a new structure, repairing an engine, or assembling a piece of machinery, the JFAST 3120MH will provide the strength and reliability you need. This product is perfect for DIY enthusiasts, hobbyists, and professionals alike, offering a reliable solution for all your fastening needs.
  • Industries – Ideal for construction, automotive, and manufacturing applications.
  • Target Audience – Suitable for DIY enthusiasts, hobbyists, and professionals.

What Our Customers Say

January 2, 2026

Absolutely no complaints!

A solid, high-performing item.

- Mathias T..

January 2, 2026

Absolutely no complaints!

A very impressive piece of kit.

- Amara Z..

January 2, 2026

Absolutely no complaints!

A brilliant solution to my problem.

- Evelyn N..

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