# Air compressor accessory Proline 3/8" thread (model 66311) — 1 pc

**URL:** https://aio.lv/en/product--proline-5663115--10786465
**Data updated:** 2026-03-12 10:13 (EET)
**Category:** Air Compressors
**Manufacturer:** Proline
**Manufacturer code:** 5663115
**EAN:** 5903755663115
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 2.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-5663115--10786465

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 18.06.2026 | free |
| Pickup points | 25.06.2026 | 1.99 EUR |
| Courier delivery to door | 25.06.2026 | 4.99 EUR |

## Summary description

Air compressor accessory Proline model 66311 with 3/8" thread, supplied as a single piece. Designed to connect tools or hoses to air compressors with compatible 3/8" fittings. Useful for maintenance, pneumatic tool hookups and workshop applications where a reliable threaded connection is required. Manufactured by Proline; suitable for professional and hobby use.

## Long description

Proline quick connector with male thread is designed for joining pneumatic systems, providing a fast and secure connection between air supply components. The connector features a 3/8" external thread and is manufactured from high-quality materials to ensure durability and resistance to high pressure.
Advantages
The Proline quick connector offers reliable sealing and quick engagement, reducing downtime during hose and tool changes. Its robust construction provides good wear resistance and long service life while the standardized 3/8" male thread ensures compatibility with a wide range of pneumatic fittings and accessories.
Suitable for
Air compressor outlets and distribution lines
Pneumatic tools and hand-held air devices
Industrial and workshop air supply systems
Key specifications
Brand: Proline
Model / MPN: 5663115
EAN: 5903755663115
Thread: 3/8" external (male)
Quantity: 1 pc
How to use
Ensure the mating fitting is clean and free of debris. Screw the 3/8" male thread into the corresponding female thread by hand until snug, then tighten with an appropriate wrench if required—do not over-tighten. Connect the hose or tool to the quick coupling until it locks in place. Check for leaks at initial pressurization and retighten if necessary following safety practices for pneumatic systems.
Usage recommendations
Use compatible threaded fittings and periodic inspections to maintain a secure connection. Replace the connector if visible wear, corrosion, or persistent leakage occurs. Observe the compressor and tool manufacturer’s pressure limits and follow general safety rules for pneumatic equipment.

## Specifications

| Feature | Value |
|---|---|
| Connecting thread | 3/8 |
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Air compressor accessory Proline 66311 cost, and is it available for purchase?

The price is 3.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 238 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 18.06.2026 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

https://aio.lv/img/cache/product/10786465/64449307_large.webp