# Construction Screws Koelner/Rawlplug 4.0x40 mm, partial thread, countersunk head, pack 24 pcs

**URL:** https://aio.lv/en/product--koelnerrawlplug-r-s3-ptx-40040--12359634
**Data updated:** 2026-04-26 18:52 (EEST)
**Category:** Miscellaneous repair tools
**Manufacturer:** Koelner/Rawlplug
**Manufacturer code:** R-S3-PTX-40040
**EAN:** 5906675481906
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 13.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 11.56 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelnerrawlplug-r-s3-ptx-40040--12359634

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Koelner/Rawlplug construction screws 4.0x40 mm feature a partial (incomplete) thread and a countersunk (conical) head for flush mounting. Supplied as a pack of 24 pieces, these self-tapping fasteners are intended for joining wooden elements, structural assemblies and furniture where a recessed head and unthreaded shank portion are required for clamping and alignment.

## Long description

Koelner/Rawlplug construction screws 4.0x40 mm are self-tapping fasteners with a partial thread and a countersunk (conical) head designed for flush mounting. Supplied in a pack of 24 pieces, these screws combine an unthreaded shank portion for clamping with a threaded tip for secure engagement in wood and other soft substrates. They are intended for structural joinery, furniture assembly and general woodworking tasks where a recessed head and a shank that allows tight clamping are required.
Advantages
These construction screws feature a partial thread that permits the unthreaded shank to act as a clamp, pulling joined parts tightly together while the threaded section secures into the substrate. The countersunk head allows the screw to sit flush with or below the material surface for a neat finish and easier finishing. Being self-tapping, they reduce the need for pre-drilling in many wood and composite applications, speeding up assembly and reducing labour time.
Suitable for
 Joining wooden elements in structural and non-structural assemblies
 Furniture assembly where recessed screw heads are needed
 Fixing components that require a clamping shank for alignment
When it may not be suitable
These screws are designed primarily for wood and similar soft materials; they may not be appropriate for use in hard metals, masonry or concrete without the correct plug or anchor. For applications requiring corrosion resistance in outdoor or marine environments, a screw with a dedicated corrosion-resistant coating or stainless steel material should be considered instead.
Key specifications
 Diameter: 4.0 mm
 Length: 40 mm
 Thread type: partial/incomplete thread with a threaded tip
 Head style: countersunk (conical) head for flush mounting
 Drive type: (compatible with standard screwdriver/drill drives typical for construction screws)
 Quantity: 24 pieces per pack
How to use
Position the screw so the unthreaded shank spans the gap between the two components to be clamped, then start driving the screw so the threaded tip engages the receiving material. Apply steady torque until the countersunk head sits flush with the surface; avoid over-torquing which can damage the material or strip the thread. For harder materials or thicker sections, pilot holes may be drilled to ensure accurate alignment and prevent splitting. Use an appropriate driver bit and a controlled-speed drill or screwdriver for best results.
What to consider before purchase
 Verify material compatibility — designed primarily for wood and wood-based composites
 Confirm the required length and diameter match the thickness of joined materials
 Assess whether additional corrosion resistance is needed for outdoor use
Usage recommendations
For consistent results, clamp or support workpieces before driving screws, use the correct driver bit, and check screw seating frequently to prevent over-penetration. When installing into edge zones, consider pre-drilling to avoid splitting; in exterior applications choose fasteners with appropriate corrosion protection.

## FAQ

### How much does the Construction Screws Koelner/Rawlplug 4.0x40 mm cost, and is it available for purchase?

The price is 13.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 545 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 13.07.2026 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/Rawlplug 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/Rawlplug 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/12359634/68322975_large.webp