# Wood construction screw Koelner/Rawlplug 8x400 mm washer head CS-8400

**URL:** https://aio.lv/en/product--koelnerrawlplug-cs-8400--11800417
**Data updated:** 2026-03-09 07:38 (EET)
**Category:** Tool kits and accessories
**Manufacturer:** Koelner/Rawlplug
**Manufacturer code:** CS-8400
**EAN:** 5906675454801
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 31.49 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 26.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelnerrawlplug-cs-8400--11800417

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

Construction wood screw Koelner/Rawlplug CS-8400, size 8x400 mm with a washer (podkładkowy) head. Designed for structural timber connections, fast and secure fixing in solid wood, laminated beams and heavy carpentry. Features a large bearing washer head for improved load distribution and reduced pull-through; suitable for indoor and protected outdoor timber assemblies.

## Long description

Wood construction screw Koelner/Rawlplug 8x400 mm washer head CS-8400 is a heavy-duty fastener designed for structural timber connections. The 8x400 mm dimension provides deep penetration for secure joints in solid wood, laminated beams and heavy carpentry. The large washer head increases bearing area to reduce local compression and pull-through, making it suitable for load-bearing assemblies used indoors and in protected outdoor locations.
Advantages
The washer head design distributes load over a larger surface, decreasing the risk of wood crushing and improving joint stability. The length and diameter ensure strong withdrawal and shear capacity for structural timber elements. These screws are intended for quick, reliable installation with appropriate pre-drilling and are compatible with common construction tools and bit drives. Their characteristics support durable connections in beams, posts and heavy timber frameworks.
Suitable for
 Structural timber connections in residential and light commercial construction
 Joining solid wood, glued laminated timber (glulam) and large cross-section carpentry elements
 Beam-to-beam, beam-to-post and ledger attachments where high bearing area is required
 Indoor and protected outdoor timber assemblies where moisture exposure is limited
Key specifications
 Diameter: 8 mm
 Length: 400 mm
 Head type: large washer head for increased bearing area
 Intended materials: solid timber, laminated beams, heavy carpentry wood
 Application: structural connections with high withdrawal and shear requirements
How to use
For reliable performance, mark and align the components, then pre-drill a pilot hole sized appropriately for the 8 mm shank and the timber species to prevent splitting. Position the screw and drive it using a suitable impact driver or drill with the correct bit until the washer head bears evenly against the wood surface. For load-bearing connections ensure correct embedment depth and follow applicable structural fastening standards. Use appropriate corrosion-resistant screws or protective measures if exposure to moisture or corrosive environments is expected.
Usage recommendations
When installing in glued laminated timber or large cross-sections, verify spacing, edge distances and embedment per design specifications. Always use pilot holes and the recommended driving tools to maintain structural integrity and consistent performance of the connection.

## FAQ

### How much does the Wood construction screw Koelner/Rawlplug CS-8400 cost, and is it available for purchase?

The price is 31.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 07.07.2026 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/11800417/67201823_large.webp