# Koelner construction wood screw 3.5x40 mm, countersunk head, TX drive

**URL:** https://aio.lv/en/product--koelner-ts-3540--11800376
**Data updated:** 2026-03-09 07:38 (EET)
**Category:** Miscellaneous repair tools
**Manufacturer:** Koelner
**Manufacturer code:** TS-3540
**EAN:** 5906675455105
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 10.32 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelner-ts-3540--11800376

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Construction wood screw by Koelner, size 3.5 x 40 mm with a countersunk (conical) head and TX (Torx) drive. Designed for fastening wooden elements in structural and carpentry work where a flush surface is required. Suitable for use in furniture assembly, decking, framing and general wood-to-wood joining with power or manual TX drivers.

## Long description

Koelner construction wood screw 3.5x40 mm with a countersunk head and TX drive is designed for secure wood-to-wood fastening where a flush finish is required. The screw’s 3.5 mm diameter and 40 mm length make it suitable for typical carpentry and construction tasks such as furniture assembly, framing and decking. The conical countersunk head allows the fastener to sit level with the wood surface after installation using a TX (Torx) driver, reducing the need for additional finishing work.
Advantages
This Koelner screw offers reliable holding power in timber due to its thread geometry and appropriate length for common structural joins. The TX drive provides improved torque transfer and reduced cam-out compared with standard Phillips or slotted drives, enabling faster installation with power drivers and more control with manual drivers. The countersunk head provides a neat, flush appearance and minimizes interference with other components or surfaces.
Suitable for
Furniture assembly and cabinetry
Decking boards and substructure connections
Wall and roof framing
General wood-to-wood joints in structural and finishing carpentry
Key specifications
Diameter: 3.5 mm
Length: 40 mm
Head type: Countersunk (conical) head for flush finish
Drive type: TX (Torx) drive for improved torque transfer
Application: Wood-to-wood fastening for structural and finishing tasks
How to use
Pre-drilling is recommended in hardwoods or close to edges to prevent splitting; choose a pilot hole diameter appropriate for the wood species and screw size. Use a TX driver bit matched to the drive recess to ensure correct engagement. Drive the screw until the head sits flush with the wood surface; avoid over-tightening which can strip the drive recess or sink the head too deep. For repeated installations with a power driver, use controlled torque settings to maintain consistent results.
Usage recommendations
Use corrosion-resistant screws or appropriate surface treatments when fastening exterior timber or when the screw will be exposed to moisture. Select pilot hole size and driving speed according to the wood hardness to reduce splitting and ensure optimal holding strength.

## FAQ

### How much does the Koelner construction wood screw 3.5x40 mm TX cost, and is it available for purchase?

The price is 12.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 554 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 03.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Koelner products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Koelner service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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