# Thread spool Brother Madeira Aerolock 8420 Dark Blue 2500 m

**URL:** https://aio.lv/en/product--brother-91288420--11161862
**Data updated:** 2026-02-14 19:33 (EET)
**Category:** Sewing Machines
**Manufacturer:** Brother
**Manufacturer code:** 91288420
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 4.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--brother-91288420--11161862

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.89 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Brother Madeira Aerolock 8420 is a 2500-meter spool of dark blue overlock/serger thread. Designed for use on overlock and coverstitch machines, the Aerolock thread provides consistent feed and reliable seams for garment construction, edge finishing and stretch fabrics. Ideal for professional sewing, mending and production where long runs and color matching are needed.

## Long description

Brother Madeira Aerolock 8420 Dark Blue is a 2500-meter spool of overlock/serger thread formulated for consistent feeding and stable seams on overlock and coverstitch machines. This dark blue polyester thread supports garment construction, edge finishing and work with stretch fabrics, providing a long spool length suitable for production sewing and extended projects where color matching and continuity are required.
Advantages
The thread offers high tensile strength and uniform thickness to reduce breakage and skipped stitches during high-speed overlocking. Its smooth surface allows reliable feeding through loopers and needles, while colorfast polyester composition resists fading and washing. The 2500 m spool size minimizes downtime from frequent thread changes and suits continuous runs.
Suitable for
 Overlock and serger seams on garments and home textiles
 Edge finishing and seam reinforcement on knit and woven fabrics
 Coverstitch operations for hems and decorative topstitching
 Production sewing and mending where long spool length is needed
Key specifications
 Thread type: polyester overlock/serger thread
 Spool length: 2500 meters
 Color: dark blue
 Recommended machines: overlock/serger and coverstitch machines
 Performance: designed for consistent feed at high stitching speeds
How to use
Thread the loopers and needles of the overlock or coverstitch machine according to the machine manufacturer’s threading paths, using the spool on a compatible spool holder to ensure free rotation. Adjust tension and stitch length for fabric type—lower tension and longer stitch length for bulky knits, and slightly higher tension for fine woven fabrics. Test stitch on a fabric scrap in the same weight and stretch as the final piece to confirm stitch appearance and strength before sewing the main item.
Usage recommendations
Store the spool in a dry, dust-free place away from direct sunlight to preserve color and fiber integrity. Replace needles regularly and match needle type and size to fabric to reduce abrasion and thread breakage when using this polyester overlock thread.

## FAQ

### How much does the Thread Brother Madeira Aerolock 8420 2500 m cost, and is it available for purchase?

The price is 5.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 02.07.2026 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: Cash payment, 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 Brother 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 Brother 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/11161862/61888579_large.webp