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Tamper-proof screws in Tenerife

Round-head tamper-proof coach screw with Tx 40 drive. It comes with its tamper-proof star cap, which covers the drive once fitted so no one can remove it. For fixing metal hardware to wood with a pilot hole, or with a nylon wall plug. 7 mm galvanised steel. In Icod de los Vinos, with delivery across Tenerife.

  • Tx 40 drive with star cap
  • Wood thread, type C point
  • 7 mm, from 40 to 90 mm
  • Delivery across Tenerife
Tornillo inviolable galvanizado con huella Tx 40

Sizes and order

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Tamper-proof screw sizes
Size (mm)Units per boxAdd to order
7 × 40100
7 × 60100
7 × 70100
7 × 90100

The size is the thread diameter by the length, not counting the head. Each screw comes with its tamper-proof star cap. To drive it you need a Tx 40 bit. Galvanised steel. Units per box according to the manufacturer. Manufacturer's data.

7 mm tamper-proof screw technical data

Manufacturer's values for the 7 mm galvanised tamper-proof screw.

Thread outer diameter
7 mm
Thread inner diameter
4.9 mm
Thread pitch
3.2 mm
Head diameter
12 mm
Head thickness
4.4 mm
Drive
Tx 40
Thread
Wood 60º
Point
Type C
Tensile capacity
9.10 kN
Use
Service class 2 (EN 1995-1-1)

How to fit the tamper-proof star cap

First drive the screw with a Tx 40 bit. Then tap the star cap into the drive with a hammer. That way the drive is covered and the screw can no longer be removed with a normal tool.

Services

  • Everything in one orderCombine the screws with the wall plugs, drill bits and the rest of the fasteners in a single order.
  • Delivery across the islandWe deliver to your site or workshop, and ship to the other islands.
  • Warehouse collectionOver 1,000 m² in Icod de los Vinos.
  • Expert adviceTell us what you're going to fix and we'll tell you which length suits you.

Frequently asked questions about tamper-proof screws

What is a tamper-proof screw?

It's a screw that can't be removed with a normal tool. It's driven with a Tx 40 bit and the drive is then covered with a tamper-proof star cap.

Is the star cap included?

Yes. Each screw is supplied with its tamper-proof star cap. It's tapped into the drive once the screw is in place.

Where is it used?

For fixing metal hardware to wood where you need a joint that can't be taken apart.

Can it be used in a wall?

Yes, with a nylon wall plug. In wood a pilot hole is needed.

What bit do I need?

A Tx 40 hexalobular bit.

Do you ship?

Yes. We deliver across Tenerife and ship to the other islands. You can also collect them from our warehouse in Icod de los Vinos.

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