# Wing Screws Zinc-plated DIN 316 M4×25 mm, Koelner, pack of 2

**URL:** https://aio.lv/en/product--koelner-b-316-04025-zn2--11800606
**Data updated:** 2026-03-09 07:39 (EET)
**Category:** Miscellaneous repair tools
**Manufacturer:** Koelner
**Manufacturer code:** B-316-04025-ZN/2
**EAN:** 5906675433318
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.49 €
**Prices and availability valid until:** 2026-07-24 23:59
**Price without VAT (21%):** 16.11 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelner-b-316-04025-zn2--11800606

## 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 zinc-plated wing screws (DIN 316) M4×25 mm, pack of 2. Fasteners with wing-shaped heads for manual tightening without tools, corrosion-resistant zinc coating, conforming to DIN 316 dimensions. Suitable for applications requiring frequent adjustments or tool-free assembly such as small fixtures, enclosures, panels and DIY projects.

## Long description

Koelner wing screws zinc-plated to DIN 316, size M4×25 mm, supplied in a pack of two. These fasteners feature a wing-shaped head designed for manual tightening and loosening without tools. The zinc-plated surface provides corrosion resistance suitable for indoor environments and general-purpose applications. The screws conform to DIN 316 dimensional standards and are intended for assemblies that require frequent adjustment or tool-free access.
Advantages
The wing head enables quick hand operation, reducing the need for screwdrivers or wrenches during installation and maintenance. Zinc plating offers basic protection against rust and extends service life in non-aggressive environments. Conformance to DIN 316 guarantees uniform thread and head dimensions for compatibility with standard M4 threaded holes and nuts. The compact M4×25 size is convenient for light-duty fastening where space is limited.
Suitable for
Small fixtures and brackets that require occasional removal or adjustment
Equipment panels and access covers for tool-free entry
Light DIY projects and hobby assemblies
Enclosures, casing and mounting of electronics with M4 threads
Key specifications
Thread size: M4
Length: 25 mm (threaded shank length)
Head type: wing (manual tightening)
Material and finish: steel with zinc plating
Standard: manufactured to DIN 316 dimensional requirements
Pack quantity: 2 pieces
How to use
Insert the screw into the corresponding M4 threaded hole or through a clearance hole into an M4 nut and turn the wing head by hand until the required clamping force is achieved. For initial alignment, finger-tighten and then adjust by hand to ensure even seating. Avoid overtightening by hand; if higher torque is necessary, use a suitable tool only if the wing head design permits and does not deform. For repeated access, maintain threads by ensuring they are clean and lightly lubricated if appropriate for the application.
Usage recommendations
Use these zinc-plated wing screws in dry or mildly corrosive indoor environments. For outdoor or highly corrosive conditions, consider stainless steel or specially coated alternatives. Check thread engagement length to ensure secure fastening—at least the full thread length should engage with the mating part or nut.

## FAQ

### How much does the Wing Screws Koelner DIN 316 M4×25 mm cost, and is it available for purchase?

The price is 19.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 16 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 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/11800606/67202004_large.webp