# Self-drilling Sheet Metal Screw Koelner B-SL-FS-3545, phosphate-coated, 3.5×45 mm, container pack

**URL:** https://aio.lv/en/product--koelner-b-sl-fs-3545--11800890
**Data updated:** 2026-03-09 07:40 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** Koelner
**Manufacturer code:** B-SL-FS-3545
**EAN:** 5906675305387
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 56.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 47.10 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelner-b-sl-fs-3545--11800890

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Koelner self-drilling sheet metal screw B-SL-FS-3545 is a phosphate-coated fastener sized 3.5×45 mm supplied in a container pack. Designed for fastening thin sheet metal to metal substrates without pre-drilling, it features a self-drilling tip and corrosion-resistant phosphate finish. Suitable for construction, roofing, HVAC and metal fabrication applications.

## Long description

Koelner self-drilling sheet metal screw B-SL-FS-3545 is a phosphate-coated fastening solution sized 3.5×45 mm supplied in a container pack. The screw features an integrated self-drilling tip that allows fastening thin sheet metal directly to metal substrates without the need for pre-drilling. The phosphate coating improves surface hardness and offers basic corrosion resistance suitable for indoor and covered outdoor applications. This fastener is intended for professional and DIY use where reliable metal-to-metal connections are required.
Advantages
The self-drilling tip eliminates the time and effort of pre-drilling, speeding up installation. The 3.5×45 mm dimensions provide sufficient length and penetration for thin sheets and common metal backing while maintaining a low profile. Phosphate coating enhances thread durability and provides moderate protection against rust in non-aggressive environments. Supplied in a container pack, the screws are easy to store and handle on-site.
Suitable for
Fastening thin sheet metal to steel or aluminum substrates
Roofing repair and installation where self-drilling fasteners are required
HVAC ductwork assembly and mounting
Light metal fabrication and panel attachment
Key specifications
Size: 3.5 × 45 mm (diameter × length)
Head type: compatible with standard cross or Torx drive (check product head marking)
Tip: integrated self-drilling point for direct metal-to-metal fastening
Surface finish: phosphate coating for improved surface hardness and basic corrosion resistance
Pack type: container pack for bulk storage and on-site use
How to use
Select the appropriate screw length and drive bit for the head type. Position the sheet metal on the substrate and apply steady pressure while driving the screw with an electric screwdriver or drill at moderate speed. Allow the self-drilling tip to cut through the sheet and into the substrate; do not apply excessive speed or force to avoid deforming the sheet. For best results, maintain perpendicular alignment between the screw and the sheet surface during installation.
Usage recommendations
Use these phosphate-coated self-drilling screws in dry or covered environments and avoid prolonged exposure to highly corrosive conditions. For outdoor or marine-exposed applications, consider stainless or zinc-coated alternatives. Pre-fit panels and test-drive a screw in a spare area to confirm fit and drive settings before full installation.

## FAQ

### How much does the Self-drilling sheet metal screw Koelner B-SL-FS-3545 cost, and is it available for purchase?

The price is 56.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 774 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 09.07.2026 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

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