# Koelner FS-3525 Drywall Screws for Gypsum Boards and Profiles 3.5x25mm, 1000 pieces

**URL:** https://aio.lv/en/product--koelner-fs-3525--12349176
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Home & DIY Accessories
**Manufacturer:** Koelner
**Manufacturer code:** FS-3525
**EAN:** 5906675305127
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.99 €
**Prices and availability valid until:** 2026-07-09 23:59
**Price without VAT (21%):** 12.39 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelner-fs-3525--12349176

## 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

Koelner FS-3525 drywall screws are designed for reliable fastening of gypsum boards to metal or wooden profiles. With a size of 3.5x25mm, these screws feature a sharp point for quick penetration and a countersunk head for a flush finish. This pack contains 1000 pieces, making it an ideal choice for professional construction and renovation projects requiring high-quality, durable fasteners for interior wall and ceiling installations.

## Long description

Koelner FS-3525 drywall screws are professional-grade fasteners specifically engineered for the secure installation of gypsum boards onto metal or wooden framing profiles. Measuring 3.5x25mm, these screws are designed to provide optimal holding power in interior construction environments. The pack includes 1000 pieces, ensuring a sufficient supply for large-scale renovation or building projects.
Advantages
These drywall screws feature a sharp, hardened point that allows for rapid penetration into both light-gauge metal profiles and wooden studs, significantly reducing installation time. The countersunk head design ensures that the screw sits flush with the surface of the gypsum board, creating a smooth finish that is easy to cover with joint compound or paint. The high-quality steel construction provides excellent resistance to snapping during driving, while the specialized coating offers protection against corrosion in standard indoor conditions.
Suitable for
Fastening gypsum plasterboards to metal profiles
Attaching drywall panels to wooden battens
Interior wall partition construction
Ceiling installation projects
General renovation and drywall repair
When it may not be suitable
These screws are not intended for use in exterior environments where they may be exposed to moisture or harsh weather conditions, as they lack the specialized anti-corrosion coatings required for outdoor applications. Additionally, they are not suitable for fastening heavy materials to masonry or concrete surfaces without the use of appropriate wall plugs.
Key specifications
Dimensions: 3.5mm diameter by 25mm length
Head type: Countersunk
Point type: Sharp
Quantity: 1000 pieces
Application: Gypsum boards to metal or wood
How to use
To use these screws, ensure you are using a compatible screwdriver or a power drill equipped with a drywall depth-control bit. Position the gypsum board firmly against the profile. Drive the screw through the board and into the underlying profile until the head is slightly recessed below the surface of the board, taking care not to break the paper layer of the gypsum. Repeat this process at recommended intervals along the studs to ensure structural integrity.
What to consider before purchase
Verify the thickness of your gypsum board to ensure 25mm length is appropriate
Check the material of your profiles to ensure compatibility with sharp-point screws
Calculate the total number of screws needed based on the spacing requirements of your project
Ensure you have a screwdriver with a depth-limiting attachment for a professional finish
Usage recommendations
For the best results, maintain a consistent screw spacing of approximately 20 to 30 centimeters along the profiles. Always ensure the screw is driven perpendicular to the board surface to maximize holding strength and prevent damage to the gypsum core.

## FAQ

### How much does the Koelner FS-3525 Drywall Screws 3.5x25mm cost, and is it available for purchase?

The price is 14.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 22 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

https://aio.lv/img/cache/product/12349176/68299193_large.webp