# Wood screw Koelner/Rawlplug 8x320 mm washer head CS-8320 for timber connections

**URL:** https://aio.lv/en/product--koelnerrawlplug-cs-8320--11800416
**Data updated:** 2026-03-09 07:38 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** Koelner/Rawlplug
**Manufacturer code:** CS-8320
**EAN:** 5906675454764
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 32.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 27.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelnerrawlplug-cs-8320--11800416

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Koelner/Rawlplug wood screw CS-8320, size 8x320 mm with a washer (bearing) head designed for timber connections and structural wood fastening. Intended for joining wooden elements where a large bearing surface is required; suitable for construction, carpentry and joinery tasks. Provides secure mechanical fixing when used with appropriate pre-drilling and installation tools.

## Long description

Koelner/Rawlplug wood screw CS-8320, size 8x320 mm with a washer (bearing) head, is designed for reliable timber connections and structural wood fastening. The long thread and substantial diameter provide strong withdrawal resistance and clamping force for joining beams, posts and heavy timber elements. The washer-style head increases bearing surface to distribute load and reduce localized crushing of soft or treated wood.
Advantages
This wood screw offers a combination of high pull-out strength and a wide bearing area thanks to its 8 mm diameter and washer head design. Its length ensures deep penetration for secure joins in thick members, while the washer head helps maintain compression and reduce splitting at the connection surface. The screw is suitable for use where mechanical fastening is preferred over nails or connectors, and it performs consistently when installed with correct pre-drilling and recommended tools.
Suitable for
 Joining beams, joists and posts in structural timber work
 Carpentry and joinery projects requiring strong mechanical fixings
 Decking, pergola and outdoor timber assemblies (when compatible with wood treatment)
 Repairing or reinforcing wooden frames and load-bearing connections
Key specifications
 Nominal diameter: 8 mm
 Length: 320 mm
 Head type: washer (bearing) head for increased contact area
 Thread: full/long thread suitable for deep timber penetration
 Material and finish: designed for structural use (confirm finish compatibility with treated wood)
How to use
Mark and clamp the timber elements to be joined, then drill an appropriate pilot hole to the recommended diameter and depth for the 8x320 mm screw to avoid splitting and to ease installation. Drive the screw with a suitable driver or impact tool, ensuring the washer head sits flush against the wood surface to provide even compression. For best results in structural applications, follow building regulations and use the correct spacing, edge distances and pre-drilling guidelines for the wood species and thickness involved.
Usage recommendations
Use corrosion-resistant fasteners and check compatibility of the screw finish with treated or preservative-treated timber for outdoor applications. When installing large-diameter screws in load-bearing connections, verify design loads and follow structural fastening practices, including pre-drilling, correct torque application and, where required, supplementary metal connectors or washers.

## FAQ

### How much does the Wood screw Koelner/Rawlplug CS-8320 8x320 mm cost, and is it available for purchase?

The price is 32.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 52 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 15.07.2026 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/11800416/67201822_large.webp