# Air compressor accessory Proline 66300 — 1/4" connecting thread

**URL:** https://aio.lv/en/product--proline-5663009--10786475
**Data updated:** 2026-03-12 10:13 (EET)
**Category:** Air Compressors
**Manufacturer:** Proline
**Manufacturer code:** 5663009
**EAN:** 5903755663009
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 4.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-5663009--10786475

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.06.2026 | free |
| Pickup points | 29.06.2026 | 1.99 EUR |
| Courier delivery to door | 29.06.2026 | 4.99 EUR |

## Summary description

Proline 66300 is an air compressor accessory featuring a 1/4" connecting thread for attachment to pneumatic hoses and fittings. Designed as a connection component, it provides a standardized threaded interface for joining compressors, tools, valves or quick couplers. Suitable for workshop and industrial pneumatic systems where a 1/4" thread connection is required.

## Long description

Proline quick connector with valve and external thread is designed for connecting pneumatic system components, providing a fast and secure connection between air supply parts. The connector features a 1/4" external (male) thread and is manufactured from high-quality materials to ensure durability and resistance to high working pressures.
Advantages
The Proline quick connector offers a compact design with an integrated valve for safe disconnection under pressure. Its 1/4" external thread ensures compatibility with standard pneumatic fittings, while the robust construction provides long service life and reliable sealing in air compressor accessory applications.
Suitable for
 Connecting hoses and tools in workshop and garage pneumatic systems
 Use with air compressors and distribution manifolds
 Maintenance and repair tasks requiring quick-change pneumatic connections
Key specifications
 Brand: Proline
 Model / MPN: 5663009
 EAN: 5903755663009
 Thread: 1/4" external (male)
 Type: Quick connector with valve
How to use
Ensure the compressor and pneumatic circuit are depressurized before installation. Screw the connector's 1/4" external thread into the corresponding female fitting until securely tightened. Connect the mating push-fit or quick coupler to the connector and check the integrated valve operates correctly when engaging and disengaging. After installation, pressurize the system and inspect for leaks.
Usage recommendations
Use appropriate thread sealant or PTFE tape on the 1/4" thread where required by the system. Regularly inspect the connector for wear or damage and replace if sealing performance degrades. Operate within the pressure limits specified by the compressor and system components.

## Specifications

| Feature | Value |
|---|---|
| Connecting thread | 1/4 |
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Air compressor accessory Proline 66300 cost, and is it available for purchase?

The price is 4.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 230 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 22.06.2026 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 Proline 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 Proline 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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