# Nut driver bit Wera 8790 HMA — hexagonal shank 1/4" (25.4/4 mm), length 50 mm, 1 pc

**URL:** https://aio.lv/en/product--wera-05004511001--3783315
**Data updated:** 2026-01-13 17:47 (EET)
**Category:** Screwdriver Bits
**Manufacturer:** Wera
**Manufacturer code:** 05004511001
**EAN:** 4013288210340
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Wera 8790 HMA deep nut driver bit, single piece. Features a hexagonal 1/4" (25.4/4 mm) shank and 50 mm overall length for access to recessed nuts. Designed for use with powered drivers or bit holders, it provides secure engagement with nut heads for fastening and loosening tasks in mechanical, electrical, and maintenance work.

## Long description

Wera 8790 HMA deep nut driver bit with a hexagonal 1/4" (25.4/4 mm) shank and a 50 mm overall length is designed to reach recessed nut heads and deliver reliable torque transfer when used with powered drivers or bit holders. This single-piece bit offers a compact profile for confined spaces while maintaining accurate engagement with fasteners common in mechanical, electrical and maintenance applications.
Advantages
The Wera 8790 HMA nut driver bit provides solid fit and reduced cam‑out thanks to precise hex geometry and a hardened tip. Its 50 mm length allows access to nuts located in deeper bores or behind obstacles without sacrificing control. The standardized 1/4" hex shank ensures compatibility with most impact drivers, cordless screwdrivers and interchangeable bit holders used in professional and DIY settings.
Suitable for
 Reaching recessed or hard-to-access hex nuts in machinery and equipment
 Electrical panel assembly and service work where space is limited
 Routine maintenance and repair tasks on automotive and industrial components
 Use with powered drivers, bit holders and quick-change chucks
Key specifications
 Shank type: hexagonal 1/4" (25.4/4 mm)
 Overall length: 50 mm
 Item form: single-piece deep nut driver bit
 Compatibility: fits standard 1/4" bit holders and driver chucks
 Application: designed for hex nut engagement and torque transfer
How to use
Insert the 1/4" hex shank into a compatible driver, bit holder or quick‑change chuck and ensure it seats fully to prevent slippage. Position the nut driver bit onto the nut head, then apply steady torque using the power tool or manual holder. For best results, maintain axial pressure while turning to keep the bit fully engaged with the fastener and avoid side loading that can damage both bit and nut.
Usage recommendations
Use the Wera 8790 HMA bit with tools rated for the intended torque and avoid excessive impact force on small or damaged fasteners. Inspect the bit tip regularly for wear and replace it when signs of rounding or deformation appear to preserve safe and reliable operation.

## Specifications

| Feature | Value |
|---|---|
| Material | Chromium-vanadium steel |
| Product colour | Grey |
| Length | 50 mm |
| Number of bits | 1 pc(s) |
| Shank size | 25.4 / 4 |
| Shank shape | Hexagonal |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 Wera 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 Wera 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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