# Spring washer Koelner DIN127 M4 A2, stainless steel, pack of 24

**URL:** https://aio.lv/en/product--koelner-b-127-04-a2--11800605
**Data updated:** 2026-03-09 07:39 (EET)
**Category:** Miscellaneous repair tools
**Manufacturer:** Koelner
**Manufacturer code:** B-127-04-A2
**EAN:** 5906675427591
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 13.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--koelner-b-127-04-a2--11800605

## 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

Spring washer Koelner DIN127 M4 A2 in stainless steel (A2) designed for use with M4 bolts and screws. Conforms to DIN127 geometry for secure locking and vibration resistance. Supplied as a pack of 24 pieces suitable for mechanical assemblies, fastening joints, and applications requiring anti-loosening retention in machinery, furniture, or equipment.

## Long description

Spring washer Koelner DIN127 M4 A2 is a stainless steel locking washer designed for use with M4 bolts and screws. Manufactured to DIN127 geometry, this A2 stainless variant provides corrosion resistance suitable for general indoor and mild outdoor environments. Supplied as a pack of 24, the washers are intended to increase joint security and resist loosening due to vibration in a variety of assemblies and equipment.
Advantages
The DIN127 form delivers a consistent split and spring action that creates axial tension on fasteners, improving clamp load retention. Made from A2 stainless steel, these washers combine mechanical resilience with resistance to oxidation, making them suitable for applications where moderate corrosion resistance is required. The standard M4 size ensures compatibility with common metric fasteners and simplifies inventory management by using a widely recognized dimension.
Suitable for
Mechanical assemblies and machinery where vibration resistance is required
Furniture fastenings and fittings that use M4 bolts or screws
Electrical enclosures and equipment with moderate exposure to humidity
General repair, maintenance and DIY fastening tasks
Key specifications
Washer standard: DIN127 geometry (external and internal dimensions per DIN127 for split spring washers)
Size: M4 (compatible with M4 bolts and screws)
Material: A2 stainless steel (austenitic stainless offering corrosion resistance for general use)
Finish: natural stainless steel surface
Quantity: pack of 24 pieces
How to use
Place the spring washer between the nut (or the screw head) and the joined parts with the split and beveled side oriented as specified by the installation practice for DIN127 washers. Tighten the fastener to the recommended torque for M4 connections so the washer exerts its spring action to maintain axial force and reduce the risk of self-loosening under vibration. Ensure mating surfaces are clean and that the washer seats flat against the contact surface for optimal performance.
Usage recommendations
For assemblies exposed to aggressive chemicals, saltwater, or prolonged outdoor conditions, consider specifying a higher-corrosion-grade stainless material. Verify torque values for the specific bolt grade used and inspect fastened joints periodically in high-vibration environments to confirm continued effectiveness.

## FAQ

### How much does the Koelner spring washer DIN127 M4 A2 cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 320 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

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