# Thread adapter BIG 3/8" to 1/4" model 428277

**URL:** https://aio.lv/en/product--big-428277--1945067
**Data updated:** 2025-12-29 07:57 (EET)
**Category:** Miscellaneous repair tools
**Manufacturer:** BIG
**Manufacturer code:** 428277
**EAN:** 4501914282774
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 8.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--big-428277--1945067

## 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

Thread adapter BIG model 428277 converts a 3/8" threaded connection to a 1/4" threaded connection. Manufactured by BIG, this adapter allows compatibility between tools, hoses or fittings with differing thread sizes. Suitable for workshop, pneumatic and hydraulic setups where a secure, standard-thread transition is required. Compact metal design for straightforward installation.

## Long description

BIG thread adapter model 428277 converts a 3/8" male/female threaded connection to a 1/4" thread, enabling compatibility between tools, hoses or fittings with differing standard thread sizes. Manufactured from brass with a compact metal design, the adapter is intended for workshop, pneumatic and hydraulic installations where a secure threaded transition is required.
Advantages
The brass construction provides corrosion resistance and reliable mechanical strength. The adapter allows a direct, standardised connection between 3/8" and 1/4" threads without requiring additional components. Its compact size ensures easy installation in confined spaces and straightforward replacement or reconfiguration of equipment.
Suitable for
 Workshop tools and fittings
 Pneumatic systems and air hoses
 Hydraulic lines with matching pressure ratings
 Adapters and converters in maintenance and repair tasks
Key specifications
 Brand: BIG
 Model: 428277
 MPN: 428277
 EAN: 4501914282774
 Material: Brass
 Input thread: 3/8"
 Output thread: 1/4"
How to use
Ensure mating threads are clean and undamaged before installation. Screw the adapter into the 3/8" threaded port until hand-tight, then finish with an appropriate wrench if required—avoid over-tightening to prevent thread damage. Attach the 1/4" fitting or hose to the opposite end and confirm a secure, leak-free connection before pressurising the system.
Usage recommendations
Verify that thread types and pressure specifications of connected components are compatible; if in doubt, consult equipment documentation. Use thread sealant or tape only if appropriate for the application and compatible with brass. Regularly inspect the adapter for wear or corrosion in routine maintenance.

## FAQ

### How much does the Thread adapter BIG 3/8"-1/4" model 428277 cost, and is it available for purchase?

The price is 9.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 BIG 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 BIG 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/1945067/65955946_large.webp