---
product_id: 251574525
title: "Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total)"
brand: "sterling"
price: "VT11892"
currency: VUV
in_stock: true
url: https://www.desertcart.vu/products/251574525-sterling-int-ext-bs1-etn4040-thumbturn-door-cylinder-satin-nickel
store_origin: VU
region: Vanuatu
---

# Secured by Design Approved TS007 1* Kitemark Certified Anti-Pick & Anti-Snap Features Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total)

**Brand:** sterling
**Price:** VT11892
**Availability:** ✅ In Stock

## Summary

> 🔑 Lock in peace of mind with style!

## Quick Answers

- **What is this?** Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) by sterling
- **How much does it cost?** VT11892 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/251574525-sterling-int-ext-bs1-etn4040-thumbturn-door-cylinder-satin-nickel)

## Best For

- sterling enthusiasts

## Why This Product

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

## Key Features

- • **Robust Design:** Engineered to resist common break-in methods.
- • **Sleek Aesthetic:** Satin nickel finish enhances any door style.
- • **Easy Installation:** Comes with everything you need for a quick setup.
- • **Unmatched Security:** Feel safe with police-approved protection.
- • **Versatile Compatibility:** Fits timber, composite, UPVC, and more.

## Overview

The Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder is a high-security lock designed for various door types, featuring advanced anti-theft technologies and a sleek satin nickel finish. Approved by the UK Police and insurance companies, this lock ensures your home remains secure against modern break-in techniques.

## Description

Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total)

## Features

- Secured By Design Approved Product - The Official UK Police Security Initiative. Recommended By The Police & Insurance Companies.
- TS007 1* Kitemark - Tested To The Very Highest Standards By BSi - British Standards Institution
- Anti-Pick, Anti-Screw, Anti-Pull, Anti-Bump and Anti-Drill components designed to resist to known attack methods on door lock cylinders
- Anti-Snap - sacrificial section leaves cylinder intact stopping thieves entering the property
- Suitable for use with a wide range of doors including timber, composite, UPVC, aluminium or patio doors with a Euro profile

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Sterling |
| Part Number | BS1 ETN4050 |
| Product Dimensions | 9 x 1.5 x 2 cm; 340 g |
| Item model number | ETN4040 |
| Size | Internal 40mm External 50mm (90mm Total) |
| Colour | Satin Nickel |
| Style | Internal 40mm External 50mm (90mm Total) |
| Finish | Satin Nickel |
| Material | Aluminium |
| Shape | Round |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Special Features | Key Unlock |
| Included Components | Lock Cylinder, 3 Keys, Fitting Screw |
| Batteries Required? | No |
| Item Weight | 340 g |

## Product Details

- **Brand:** Sterling
- **Special feature:** Key Unlock
- **Lock type:** Key Lock
- **Item dimensions L x W x H:** 9 x 1.5 x 2 centimetres
- **Material:** Aluminium

## Images

![Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 1](https://m.media-amazon.com/images/I/71ThDmr8TWL.jpg)
![Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 2](https://m.media-amazon.com/images/I/813Mh1nUD5L.jpg)
![Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 3](https://m.media-amazon.com/images/I/81P6PKdMmjL.jpg)
![Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 4](https://m.media-amazon.com/images/I/81Ih20IK19L.jpg)
![Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 5](https://m.media-amazon.com/images/I/814+hAxzlTL.jpg)

## Available Options

This product comes in different **Size Name** options.

## Frequently Bought Together

- Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total)
- Sterling TS007 BS1 1 Star Police Approved Secured by Design Euro Door Cylinder, Satin Nickel, 50mm x 50mm (100mm Total)
- UPVC Door Handles Set - White - Lever/Lever - 92mm PZ (Centres) - 122mm Screw to Screw - Backplate 212mm X 34mm- White Replacement- PVC Door Handle

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**Shop now:** [https://www.desertcart.vu/products/251574525-sterling-int-ext-bs1-etn4040-thumbturn-door-cylinder-satin-nickel](https://www.desertcart.vu/products/251574525-sterling-int-ext-bs1-etn4040-thumbturn-door-cylinder-satin-nickel)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-03*