# Compression fitting Barrow THKN-3/8-B03 go — 13/10 mm (gold)

**URL:** https://aio.lv/en/product--barrow-thkn-38-b03-go--5795713
**Data updated:** 2026-03-07 15:15 (EET)
**Category:** CPU Coolers & PC Cooling Systems
**Manufacturer:** Barrow
**Manufacturer code:** THKN-3/8-B03 go
**EAN:** 6937826611063
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 6.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--barrow-thkn-38-b03-go--5795713

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

Barrow compression fitting THKN-3/8-B03 go is a brass-colored (gold) connector designed for 13/10 mm tubing. The fitting provides a secure, leak-resistant mechanical joint for liquid cooling or fluid transfer systems that use 13 mm outer / 10 mm inner diameter tubes. Suitable for assembling and maintaining custom cooling loops, radiator and reservoir connections, and retrofitting tubing runs.

## Long description

Barrow THKN-3/8-B03 go compression fitting in brass-colored gold is designed for use with 13 mm outer / 10 mm inner diameter tubing. The fitting creates a secure mechanical joint that resists leaks and maintains flow integrity in liquid cooling and fluid transfer systems. Its compact profile and metal construction allow for reliable connections on radiators, reservoirs, pumps and tubing runs where a 13/10 mm tube interface is required.
Advantages
The compression design delivers a tight seal without the need for adhesives, ensuring straightforward installation and disassembly for maintenance or system changes. A metal body provides durability and wear resistance, while the brass-colored finish offers aesthetic compatibility with gold-toned system components. The fitting is engineered to match 13 mm outer diameter tubing and 10 mm inner diameter cores, minimizing the risk of mismatch and reducing potential leakage points.
Suitable for
Custom PC liquid cooling loops using 13 mm/10 mm tubing
Connections between radiators, reservoirs, and pumps in small-bore systems
Repairing or retrofitting existing tubing runs that require a compression connection
Fluid transfer setups in compact enclosures where a low-profile metal fitting is needed
Key specifications
Compatible tube dimensions: 13 mm outer diameter / 10 mm inner diameter
Type: compression fitting
Material: metal body with brass-colored (gold) finish
Application: liquid cooling and low-pressure fluid transfer
Connection style: mechanical compression joint for reusable assembly
How to use
Ensure tubing is cut square and free of burrs before assembly. Slide the compression nut and any included ferrule onto the tube, insert the tube fully into the fitting body, then tighten the compression nut until a firm seal is obtained. Do not overtighten; secure the nut to manufacturer-recommended torque or until resistance indicates a leak-resistant fit. After assembly, perform a pressure or leak test at system operating conditions to verify sealing integrity before continuous use.
Usage recommendations
Use tubing sized precisely to 13 mm outer and 10 mm inner diameters for optimal sealing. When installing in visible areas, handle the brass-colored surface with clean gloves to avoid fingerprints and scratches. Inspect fittings periodically and after thermal cycling; replace any component that shows deformation or corrosion to maintain system reliability.

## FAQ

### How much does the Barrow THKN-3/8-B03 go compression fitting cost, and is it available for purchase?

The price is 7.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 22 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 16.07.2026 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 Barrow 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 Barrow 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/5795713/68546145_large.webp