---
product_id: 53632910
title: "46mm x 50mm Waste nut Box Spanner"
brand: "monument"
price: "€ 28.37"
currency: EUR
in_stock: true
reviews_count: 8
category: "Monument"
url: https://www.desertcart.at/products/53632910-46mm-x-50mm-waste-nut-box-spanner
store_origin: AT
region: Austria
---

# 50mm extended length for tight spots 46mm & 50mm dual sizes Bright plated alloy steel durability 46mm x 50mm Waste nut Box Spanner

**Brand:** monument
**Price:** € 28.37
**Availability:** ✅ In Stock

## Summary

> 🔧 Unlock tight spots with ease—be the plumbing hero everyone envies!

## Quick Answers

- **What is this?** 46mm x 50mm Waste nut Box Spanner by monument
- **How much does it cost?** € 28.37 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/53632910-46mm-x-50mm-waste-nut-box-spanner)

## Best For

- monument enthusiasts

## Why This Product

- Trusted monument brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Pros:** Top-rated tool with 4.5 stars from 398 reviews—your go-to for plumbing fixes
- • **Slim & Long Design:** Extra length and thin profile reach awkward, tight plumbing spaces
- • **Tommy Bar Compatible:** Holes designed to accept a tommy bar for superior torque leverage
- • **Dual-Size Precision Fit:** Two ends (46mm & 50mm) cover most waste nuts effortlessly
- • **Corrosion-Resistant Build:** Bright plated alloy steel ensures lasting strength and rust resistance

## Overview

The Monument 308L Waste Nut Box Spanner (46mm x 50mm) is a professional-grade, double-ended tool crafted from bright plated alloy steel. Its slim, elongated design is engineered to access and loosen stubborn waste nuts in confined plumbing spaces, compatible with a tommy bar for enhanced torque. Highly rated by users, it’s a must-have for maintenance, plumbing, and automotive repairs.

## Description

308L Waste Nut Box Spanner 46 x 50mm

Review: Useful specialist tool - This is an essential tool for anyone wanting to install/remove a standard UK bathroom basin wastes. This box spanner is very well made from thick robust metal and is double ended for two different sized hex nuts: 46mm and 50mm (inner diameters). The total length is 200mm. There are also 4 holes for a tommy bar (not included) for extra leverage but I found tightening by hand was good enough. The tool is reassuringly heavy. The waste backnut on my basin is 1-1/4in BSP (46mm), which is quite common for bathrooms, and this spanner fitted quite well although there was a little bit of play. Please note this spanner will only fit brass or metal nuts. The cheap plastic nuts that come with most wastes will not fit. Overall this is quite a specialised tool for a very specific job, but worth it to avoid scraping your hands in the tight spaces under the sink. This is a great quality tool from Monument. Recommended.
Review: Very efficient tool. - If you have awkward access under your basin and the metal back nut is well corroded/stuck then this tool is great! Just provide your own tommy bar and it will loosen the nut with a bit of torque easily. Each end has a slightly different size to fit most metal back nuts.

## Features

- Doubled-Ended Box Spanners Are Designed To Be Thinner And Considerably Longer Than Sockets.
- Ideal For Loosening Or Tightening Nuts And Bolts Located In Tight Spaces.
- Frequently Used In Plumbing, Maintenance, And Automotive Repairs.
- The 308L Box Spanner Is Made From Bright Plated Steel.
- This Box Spanner Has Holes To Accept A Tmmy Bar.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01FG9UAFE |
| Best Sellers Rank | 23,257 in DIY & Tools ( See Top 100 in DIY & Tools ) 10 in Box Spanners |
| Brand | Monument |
| Colour | Multi |
| Customer Reviews | 4.5 out of 5 stars 398 Reviews |
| EU Spare Part Availability Duration | 1 Years |
| Finish | Polished |
| Global Trade Identification Number | 05015375003087 |
| Head Style | Box End |
| Included Components | 308L Waste Nut Box Spanner 46 x 50mm |
| Item Length | 50 Millimetres |
| Item Package Quantity | 1 |
| Item Type Name | 308L Waste Nut Box Spanner 46 x 50mm |
| Item Weight | 0.68 Kilograms |
| Item length | 50 Millimetres |
| Item package quantity | 1 |
| Item weight | 0.68 Kilograms |
| Jaw Capacity | 50 Millimetres |
| Manufacturer | Monument |
| Manufacturer Warranty Description | None. |
| Material | Alloy Steel |
| Measurement Standard | Metric |
| Model Number | MON308 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Operation Mode | Mechanical |
| Part Number | MON308 |
| Set Name | No Set |

## Product Details

- **Brand:** Monument
- **Colour:** Multi
- **Item length:** 50 Millimetres
- **Item weight:** 0.68 Kilograms
- **Material:** Alloy Steel

## Images

![46mm x 50mm Waste nut Box Spanner - Image 1](https://m.media-amazon.com/images/I/71hz-RsbA0L.jpg)

## Questions & Answers

**Q: What size basin waste backnut does this fit please? will this fit a standard bsp "one and a quarter inch" waste hex backnut (brass or plastic)?**
A: This wrench fits one end 45mm the other end 50mm waste a wonderful tool only let down by not supplying a bar to turn it but this be easily done with a piece of rod or screwdriver

**Q: The image is a hexagonal box spanner. Real basin waste nuts are octagonal. Is the image simply generic or is this the wrong product for octogon nuts?**
A: I can confirm that it is a hexagonal box spanner. I think some plastic backnuts are octagonal - although not all - and also some are 47mm and are too big for this spanner. If you buy a brass backnut it should fit and they are stronger than the plastic versions.

**Q: What is the measurement across flats at both ends please. I have a brass back-nut that is 38mm across flats and need a box spanner to fit. Is this it?**
A: No

**Q: The brass backnut on my basin waste is 45mm acroos the flats and I want to know if this basin wrench/box spanner is the correct size.  Please advise**
A: I have used this product a lot and it has fitted all the wastes I have tried it on. Great buy 😊

## Customer Reviews

### ⭐⭐⭐⭐⭐ Useful specialist tool
*by S***0 on 12 September 2019*

This is an essential tool for anyone wanting to install/remove a standard UK bathroom basin wastes. This box spanner is very well made from thick robust metal and is double ended for two different sized hex nuts: 46mm and 50mm (inner diameters). The total length is 200mm. There are also 4 holes for a tommy bar (not included) for extra leverage but I found tightening by hand was good enough. The tool is reassuringly heavy. The waste backnut on my basin is 1-1/4in BSP (46mm), which is quite common for bathrooms, and this spanner fitted quite well although there was a little bit of play. Please note this spanner will only fit brass or metal nuts. The cheap plastic nuts that come with most wastes will not fit. Overall this is quite a specialised tool for a very specific job, but worth it to avoid scraping your hands in the tight spaces under the sink. This is a great quality tool from Monument. Recommended.

### ⭐⭐⭐⭐⭐ Very efficient tool.
*by A***R on 10 April 2026*

If you have awkward access under your basin and the metal back nut is well corroded/stuck then this tool is great! Just provide your own tommy bar and it will loosen the nut with a bit of torque easily. Each end has a slightly different size to fit most metal back nuts.

### ⭐⭐⭐⭐ It works. Good product
*by G***E on 5 February 2026*

Bought this to use it on a 50mm waste basin sprung nut. It works. The only downside is that the plastic nut is bigger. You have to file the nut a little bit. 5 extra minutes of work. I used a small file. After that to tighten it was easy. Used only my hands

## Frequently Bought Together

- Monument 46mm x 50mm Waste nut Box Spanner
- EVO-STIK Plumber's Mait, Non-Setting Putty for Sanitary Joints, Permanant Flexibility, Waterproof, 750g

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-10-15*