# Construction wood screw Koelner TS-4050 4×50 mm countersunk head TX drive

**URL:** https://aio.lv/en/product--koelner-ts-4050--11800887
**Data updated:** 2026-03-09 07:40 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** Koelner
**Manufacturer code:** TS-4050
**EAN:** 5906675455365
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 10.99 €
**Prices and availability valid until:** 2026-07-31 23:59
**Price without VAT (21%):** 9.08 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelner-ts-4050--11800887

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.89 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

Koelner TS-4050 is a construction screw for wood with dimensions 4×50 mm, countersunk (conical) head and TX (Torx) drive. Designed for fastening wood elements and frames, it provides straightforward installation with a Torx driver and a flush finish due to the countersunk head. Suitable for structural joins, carpentry and general woodworking applications.

## Long description

Koelner TS-4050 4×50 mm is a construction wood screw with a countersunk (conical) head and a TX (Torx) drive. It is designed for fastening wooden elements and frames where a flush finish is required. The combination of a conical head and Torx drive enables precise seating of the head into the material and reliable torque transfer during installation.
Advantages
The countersunk head allows the screw to sit flush with or below the wood surface, reducing the need for additional finishing. The TX (Torx) drive improves bit engagement and reduces cam-out compared with slotted or Phillips drives, enabling faster and more controlled installation. Its 4×50 mm dimensions make it suitable for medium-thickness joining tasks in carpentry and general woodworking.
Suitable for
Structural wood joins and frame assembly
Carpentry and furniture construction
Fixing battens, rails and trim to timber substrates
General DIY and renovation woodwork
Key specifications
Thread type: wood screw thread designed for timber engagement
Head type: countersunk (conical) head for flush mounting
Drive type: TX (Torx) drive for improved bit engagement
Material and finish: suitable for indoor woodworking applications (refer to packaging for corrosion resistance and coating details)
Dimensions: nominal diameter 4 mm, length 50 mm
How to use
Select an appropriate Torx driver or bit that matches the TX drive. For harder woods or precise alignment, pre-drill a pilot hole with a suitable diameter to prevent splitting and to ensure correct seating of the countersunk head. Drive the screw until the head is flush with the wood surface or slightly countersunk as required. Use consistent torque to avoid over-driving and damaging the wood or the screw head.
Usage recommendations
For exterior or high-moisture environments, verify the screw’s corrosion protection or choose screws with a compatible coating. When joining thin or delicate boards, reduce the pilot hole diameter and use controlled torque to prevent material damage. Store screws in a dry place and use the correct Torx bit size to maintain efficient installation and prolong tool life.

## FAQ

### How much does the Wood screw Koelner TS-4050 4×50 mm cost, and is it available for purchase?

The price is 10.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 702 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 17.07.2026 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

https://aio.lv/img/cache/product/11800887/67202292_large.webp