Metalmate High Tensile Set Screw - M10 x 40mm - Silver

Discover the strength and reliability of Metalmate High Tensile Set Screws, perfect for a variety ...

Best current price£10.31from Power Tools Direct

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Power Tools DirectMetalmate® Z0318m540020 High Tensile Set Screw Zp M8 X 20Mm (Box 200)
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Rapid Online - Rapid Electronics Ltd.METALMATE® Z0318M540065 High Tensile Set Screw ZP M8 x 65mm (Box 100)
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Blueperry agriculture (UK)Metalmate® Metalmate High Tensile Set Screw Zp M8 X 25Mm (Box 200) Z0318m540025
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eBayMETALMATE® High Tensile Set Screw ZP M8 x 25mm (Box 200)
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B&QB&Q - Z0318M540025 High Tensile Set Screw Zp M8 X 25mm Box 200 Memhts825Z
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Product Information

Full details

Designed for professionals and DIY enthusiasts in engineering, construction, and maintenance, Metalmate High Tensile Set Screws offer exceptional structural integrity for heavy-duty fastening tasks. These Grade 8.8 steel screws provide superior tensile strength and reliability, though their zinc-plated finish is intended primarily for indoor or sheltered environments rather than harsh, long-term outdoor exposure without additional protection.

All features

ColourSilver
Model Part NumberZ0318M560040
BrandMetalmate

Extended Product Information

FAQs

What does the 8.8 grade mean?

Grade 8.8 denotes the tensile strength of the steel; the first 8 indicates a nominal tensile strength of 800 MPa, and the second digit indicates the yield strength is 80% of the tensile strength.

Are these screws fully threaded?

Yes, as they are manufactured to DIN 933 standards, they are fully threaded from the head to the tip.

Can I use these outdoors?

The zinc plating provides basic corrosion resistance, but they are best used in sheltered or dry environments to prevent rust over time.

What is the diameter and length of this screw?

This is an M10 bolt, meaning the thread diameter is 10mm, and the length from the underside of the head to the tip is 40mm.

Are nuts included in the box?

The box contains 100 set screws; nuts are typically sold separately depending on your specific project needs.

Troubleshooting

Bolt is difficult to screw into a tapped hole

Check for debris or cross-threading; ensure the tap size matches the M10 specification exactly.

Bolt head rounding during installation

Ensure the socket or wrench is not worn and is the correct metric size for an M10 head.

Surface rust appearing on the screw

Clean the affected area and apply a light coating of machine oil or a corrosion inhibitor spray.

Pros and Cons

Pros

  • High tensile strength suitable for heavy-duty use
  • Standardized threading for wide compatibility
  • Durable zinc-plated coating inhibits early oxidation
  • Generous pack size provides excellent value for professional workflows

Cons

  • Not suitable for extreme marine or salt-spray environments
  • Specific 40mm length may require spacers for thinner materials
  • Requires proper tooling to avoid stripping the bolt head

Setup, Compatibility & Care

To ensure maximum holding power, always use an appropriately sized wrench or socket that fits the M10 head snugly to prevent rounding. When fastening into tapped holes, ensure the threads are clean and free of debris. For long-term maintenance, keep the bolts in a dry environment to prolong the efficacy of the zinc coating. If installing in an area prone to vibration, consider using a thread-locking compound or a spring washer to prevent the screw from loosening over time.

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