# Enclosure Accessory Rittal AS 4055.779 — metallic, round 21.0 mm matryce

**URL:** https://aio.lv/en/product--rittal-4055779--12401204
**Data updated:** 2026-04-29 13:49 (EEST)
**Category:** Furniture Accessories
**Manufacturer:** Rittal
**Manufacturer code:** 4055779
**EAN:** 4028177920682
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 76.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 63.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--rittal-4055779--12401204

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Rittal AS 4055.779 is an enclosure accessory in metallic finish designed as a round 21.0 mm matryce (die) for use with Rittal cabinets and panels. It serves for creating precise circular openings and fittings in enclosure doors or panels. Practical for electrical enclosures, instrument cutouts and panel-mounted components.

## Long description

Rittal AS 4055.779 is a metallic round 21.0 mm matryce (female die) intended for use with compatible male dies to produce precise circular openings in enclosure doors, panels and busbars. Designed for electrical enclosures and control cabinets, this accessory enables accurate, repeatable hole-making for panel-mounted components, cable glands and instrument cutouts. The metallic construction provides durability for repeated use in industrial and workshop settings.
Advantages
The female die delivers precise, consistent 21.0 mm round holes when paired with the correct male die, reducing manual finishing work and ensuring uniform panel fitment. Its metallic build resists wear and maintains cutting accuracy over multiple operations. The accessory is compact and straightforward to integrate into existing punching or forming workflows for Rittal enclosures and similar metal panels.
Suitable for
Punching 21.0 mm round openings in enclosure doors and panels
Creating mounting holes for switches, LEDs, and small instruments
Producing clean round holes in busbars when used with the matching male die
Panel preparation in workshops and electrical assembly lines
When it may not be suitable
This matryce is a female die only and must be used together with the matching male die to perform punching operations; it cannot create holes by itself. It is intended for 21.0 mm round holes only and is not suitable for other diameters or non-circular cutouts. For very thick or hardened materials, confirm compatibility with your punching equipment to avoid damage or diminished performance.
Key specifications
Type: Female round die (matryce)
Nominal hole diameter: 21.0 mm
Finish: Metallic
Intended use: Panel and busbar punching (requires matching male die)
Compatibility: Designed for use with Rittal enclosure systems and suitable punching/forming tools
How to use
Fit the female die into the appropriate holder of your punching or forming machine and install the corresponding male die in the mating position. Position the panel or busbar accurately and secure it before actuating the tool. Perform a test punch on scrap material to confirm alignment and hole quality, then proceed with production. After use, clean debris from the die edges and store in a dry place to maintain performance.
What to consider before purchase
Verify you have the correct matching male die for 21.0 mm round punching
Confirm that your punching equipment supports the die type and material thickness
Ensure the accessory is suitable for the panel material (e.g., steel, aluminium) you will be working with
Consider spare dies if you expect frequent or heavy usage
Usage recommendations
Use the female and male die pair only with compatible punching/forming machines and follow equipment safety guidelines. Regularly inspect and, if necessary, replace worn dies to maintain hole quality and prevent damage to panels or busbars.

## Specifications

| Feature | Value |
|---|---|
| Package weight | 286 g |
| Product colour | Metallic |
| Hole diameter | 21 mm |

## FAQ

### How much does the Rittal AS 4055.779 enclosure accessory 21.0 mm cost, and is it available for purchase?

The price is 76.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 14.07.2026 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. 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 Rittal 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 Rittal 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

### Where can I download the instructions for Rittal AS 4055.779 enclosure accessory 21.0 mm?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12401204/68689567_large.webp