Toolcraft Hexagonal Screw DIN 933 Polyamide - M4 x 25mm

Toolcraft Hexagonal Screw DIN 933 Polyamide M4 x 25mm Pack Of 10. DIN 933 metric Hexagon head Poly...

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This guide is for DIY enthusiasts, electricians, and engineers who need reliable, non-conductive fasteners for specific applications. The TOOLCRAFT Hexagonal Screw DIN 933 Polyamide offers excellent electrical isolation and corrosion resistance, making it ideal for sensitive electronic assemblies or environments where conductivity is undesirable. A key caveat is that polyamide is a plastic and has lower tensile strength compared to metal screws, making it unsuitable for heavy-duty structural applications.

All features

ColourWhite
Model Part Number830245
BrandTOOLCRAFT

Extended Product Information

FAQs

What is Polyamide, and why is it used for screws?

Polyamide is a type of plastic known for its strength, durability, and excellent electrical insulating properties. It's used here to prevent electrical conductivity and resist corrosion, making it suitable for specific electronic and environmental applications.

Can these screws be used in metal applications?

Yes, they can be used to fasten components to metal, provided the metal part has a compatible M4 threaded hole. However, they should not be used where significant structural load is applied to the screw itself.

What is the maximum temperature these screws can withstand?

While specific temperature limits vary, polyamide generally has a lower continuous use temperature compared to most metals. Avoid applications involving sustained high heat.

How do I know if an M4 screw is appropriate for my project?

An M4 screw is appropriate for tasks requiring a relatively small fastener with good thread engagement. Consider the load requirements; if the connection needs to bear significant weight or stress, a metal screw may be more suitable.

Are these screws suitable for outdoor use?

Yes, their resistance to corrosion makes them suitable for outdoor use, provided they are not subjected to extreme temperatures or excessive mechanical stress. They will not rust like metal screws.

What does DIN 933 refer to?

DIN 933 is a German standard that specifies the dimensions and requirements for hexagon head screws with a non-threaded portion of the shank. It ensures consistency and interchangeability.

Troubleshooting

Screw does not thread smoothly

Ensure you are using an M4 nut or an M4 tapped hole. Check for any debris in the threads or misalignment.

Hex driver slips during tightening

Ensure you are using the correct size hex driver (3mm). Do not apply excessive force, as this can damage the head and make it difficult to remove.

Screw head strips or breaks

This usually indicates overtightening or using excessive force. Use a calibrated torque driver if possible, and avoid forcing the screw.

Pros and Cons

Pros

  • Excellent electrical insulation for safety in electronic applications.
  • Resistant to corrosion, ideal for humid or chemically active environments.
  • Lightweight compared to metal fasteners.
  • Non-magnetic properties.

Cons

  • Lower tensile and shear strength than metal screws, not suitable for load-bearing applications.
  • Can be damaged by excessive force or overtightening.
  • Limited temperature resistance compared to some metals.
  • May deform under high stress.

Setup, Compatibility & Care

Setup:

These screws are designed for use with M4 nuts or M4 threaded holes. A standard 3mm hex wrench or hex driver is required for tightening. Ensure the material you are fastening into can accept an M4 thread. Do not overtighten, as this can strip the threads or damage the screw head.

Compatibility:

  • Compatible with M4 nuts and M4 threaded components.
  • Requires a 3mm hex driver.
  • Suitable for plastics, wood, and other materials that can be tapped for an M4 thread.

Care:

Polyamide screws require minimal care. Keep them clean and dry. Avoid exposure to solvents or high temperatures that could degrade the plastic. Regular inspection for signs of wear or damage is recommended, especially if used in demanding environments.

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