# Socket bit hex Allen 1/2" H4 x 55 mm STANLEY STMT73371-8B

**URL:** https://aio.lv/en/product--stanley-stmt73371-8b--11952112
**Data updated:** 2026-03-11 13:49 (EET)
**Category:** Screwdriver Bits
**Manufacturer:** STANLEY
**Manufacturer code:** STMT73371-8B
**EAN:** 4715898206378
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 3.71 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--stanley-stmt73371-8b--11952112

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

1/2" drive hex (Allen) socket bit H4 x 55 mm by STANLEY, model STMT73371-8B. Designed for use with 1/2" drive ratchets, torque wrenches or impact drivers that accept socket bits. Provides a 4 mm internal hex profile and a 55 mm overall length for accessing recessed fasteners in mechanical, automotive and assembly tasks.

## Long description

STANLEY 1/2" drive hex (Allen) socket bit H4 x 55 mm is a tool insert designed for use with 1/2" drive ratchets, torque wrenches and compatible impact drivers. The bit provides a 4 mm internal hex profile and a 55 mm overall length to reach recessed or deep-set hex fasteners commonly found in mechanical, automotive and assembly applications. Manufactured for compatibility with standard 1/2" drive sockets, this hex socket bit offers a compact profile for confined spaces and routine maintenance tasks.
Advantages
The socket bit combines a standardized 4 mm internal hex geometry with a 55 mm shaft length to improve access to recessed fasteners while maintaining a secure fit with 1/2" drive tools. Its design reduces cam-out risk and enables reliable torque transfer when used with torque-controlled tools. The bit's length and drive interface make it suitable for tasks that require both reach and stable connection to drive tools.
Suitable for
 Accessing recessed hex (Allen) screws and bolts in mechanical assemblies
 Automotive repair and maintenance where a 4 mm internal hex is required
 General assembly, disassembly and routine service tasks in workshops
 Use with 1/2" drive ratchets, torque wrenches or compatible impact drivers
Key specifications
 Drive type: 1/2" square drive compatible socket bit
 Tip profile: 4 mm internal hex (Allen)
 Overall length: 55 mm
 Material and finish: engineered for tool-grade durability (manufacturer standard)
 Compatibility: fits standard 1/2" drive tools and socket adapters
How to use
Select the STANLEY 4 mm hex socket bit and attach it securely to a 1/2" drive ratchet, torque wrench or impact driver designed to accept socket bits. Align the internal hex tip with the fastener head, apply axial pressure to seat the tip, then rotate using the chosen drive tool. When using a torque wrench, set the required torque value before applying force. For impact driver use, ensure the driver and bit are rated for impact operation if required by the task.
Usage recommendations
Use the bit with the appropriate drive tool and torque setting for the fastener size to avoid rounding the hex recess. Inspect the bit for wear or deformation before use and replace it if signs of damage appear. For operations requiring high torque, confirm compatibility with impact-rated tools and adapters to maintain safe and effective performance.

## FAQ

### How much does the Socket bit hex 1/2" H4 x 55 mm STANLEY cost, and is it available for purchase?

The price is 4.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 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 09.07.2026 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 STANLEY 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 STANLEY 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/11952112/67396133_large.webp