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M3 x 20mm Full Thread Carbon Steel Hex Socket Cap Head Screws Bolts - 50 Pcs - Black

M3 x 20mm Full Thread Carbon Steel Hex Socket Cap Head Screws Bolts - 50 Pcs - Black

Designed with hex socket head and metal material. Used widely in the home and office appliance, co...

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M3 X 20Mm Carbon Steel Full Thread Hex Socket Cap Head Screws Bolts Black 50 Pcs 602451216582

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OnBuy.comM3 X 20Mm Carbon Steel Full Thread Hex Socket Cap Head Screws Bolts Black 50 Pcs 602451216582
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Product Information

Full details

This guide is for DIY enthusiasts, mechanics, and manufacturers needing reliable fasteners. The key benefit is the secure and strong connection provided by these carbon steel screws. A caveat to consider is their specific M3 size, requiring compatibility with M3 threaded holes. These black, hex socket cap head screws are designed for a wide range of applications in machinery, electronics, and assembly, offering a durable and consistent fastening solution.

All features

ColourBlack
Model Part Numbera16011500ux0175
Branduxcell

Extended Product Information

FAQs

What material are these screws made of?

These screws are made of carbon steel.

What size hex key is needed for these screws?

A 2.5mm hex key (Allen wrench) is required.

What is the thread size and length of these screws?

The thread size is M3, and the length is 20mm.

What is the main advantage of the hex socket head design?

The hex socket head allows for a secure grip and high torque application with a hex key, enabling tighter fastening.

Are these screws suitable for outdoor use?

They have a black finish for some corrosion resistance, but prolonged outdoor exposure, especially in wet conditions, may lead to rust as they are carbon steel and not stainless steel.

How many screws are included in a pack?

Each pack contains 50 screws.

Can these screws be used with plastic components?

Yes, they can be used with plastic components, provided the plastic is strong enough to accept an M3 thread, or if you are using a suitable M3 nut or insert.

Troubleshooting

Screw does not thread properly

Ensure you are using an M3 threaded hole or nut. Verify that the existing thread is not damaged. Check that the screw is entering the hole straight.

Hex key slips or strips the socket head

Use a high-quality 2.5mm hex key. Ensure the key is fully seated in the socket. Do not apply excessive force. If the head is already stripped, you may need specialized tools to remove it.

Screw head is stuck and won't tighten or loosen

Apply a penetrating lubricant and let it sit. Gently tap the end of the hex key while attempting to turn. If necessary, use a screw extractor tool.

Rust is forming on the screws

Wipe screws with a dry cloth and store them in a dry place. For minor rust, apply a rust remover and consider a light coating of oil or anti-seize compound for future applications in potentially damp environments.

Pros and Cons

Pros

  • Durable carbon steel construction ensures reliable performance.
  • Hex socket drive allows for secure tightening and easy removal.
  • Full thread design maximizes grip and holding strength.
  • The black finish adds a layer of corrosion resistance and a clean look.
  • Suitable for a wide variety of machinery and assembly applications.

Cons

  • Specific M3 size may not fit all applications; requires compatible M3 threads.
  • Carbon steel, while strong, may require additional protection in highly corrosive environments.
  • Designed for mechanical fastening, not decorative purposes.
  • Small size means they can be easily lost if not stored properly.

Setup, Compatibility & Care

Setup:

  1. Ensure you have the correct M3 threaded hole or nut for the screw.
  2. Use a 2.5mm hex key (Allen wrench) to drive the screw.
  3. Insert the screw into the desired location and tighten until snug. Avoid over-tightening to prevent stripping the threads or damaging the material.

Compatibility:

  • These screws are compatible with any M3 threaded hole or M3 nut.
  • The 20mm length is suitable for materials with a combined thickness of up to approximately 17mm (allowing for thread engagement).
  • The black finish is generally compatible with most materials, but testing is recommended for sensitive finishes.

Care:

  • Store screws in a dry environment to prevent rust, especially if exposed to moisture.
  • Clean screws with a dry cloth. If rust appears, it can be removed with a rust remover and the screw may need to be re-lubricated or replaced depending on the severity.
  • Periodically check fastened components to ensure screws remain tight.

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