# Bolt adapter BIG 1/4" to 3/8" BIG 428288

**URL:** https://aio.lv/en/product--big-428288--1894909
**Data updated:** 2025-12-29 07:52 (EET)
**Category:** Tool kits and accessories
**Manufacturer:** BIG
**Manufacturer code:** 428288
**EAN:** 4501914282880
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.49 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 7.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--big-428288--1894909

## 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 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Adapter bolt BIG 428288 converts a 1/4" connection to a 3/8" connection. Manufactured by BIG, this adapter allows compatibility between tools, sockets or fittings with different drive sizes. Practical for workshops and on-site repairs where fast switching between 1/4" and 3/8" drive accessories is needed, ensuring secure mechanical connection.

## Long description

BIG 27 mm bolt adapter 428288 converts a 1/4" drive to a 3/8" drive, providing a secure mechanical connection between tools and sockets with different drive sizes. The adapter is designed for use in workshops and on-site repairs where compatibility between 1/4" and 3/8" accessories is required. The 1/4" thread length is 6 mm and the 3/8" thread length is 21 mm, with an overall bolt length of 27 mm.
Advantages
This BIG bolt adapter allows quick and reliable conversion from 1/4" to 3/8" drive without loose fittings. Its compact 27 mm length makes it suitable for use in confined spaces and for fast tool changes. Manufactured to match standard thread sizes, it ensures a secure mechanical fit between drive accessories.
Suitable for
Converting 1/4" drive tools to accept 3/8" sockets
Workshops and professional repair work
On-site maintenance and fast tool changes
Key specifications
Brand: BIG
Manufacturer part number (MPN): 428288
EAN: 4501914282880
Overall length: 27 mm
Thread sizes and lengths: 1/4" thread — 6 mm; 3/8" thread — 21 mm
How to use
Insert the 1/4" threaded end into the corresponding 1/4" drive tool or accessory and tighten securely by hand or with appropriate tools if required. Attach the 3/8" socket or accessory to the opposite end and ensure the connection is firm before applying torque. Follow the torque limits and safety practices of the tools in use.
Usage recommendations
Use the adapter only within the rated torque specifications of your tools and sockets. Inspect threads for wear or damage before use and replace the adapter if any deformation or excessive wear is present to maintain a safe, secure connection.

## FAQ

### How much does the Bolt adapter BIG 1/4" to 3/8" 428288 cost, and is it available for purchase?

The price is 9.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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: 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

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