---
product_id: 313296169
title: "Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish"
brand: "sumnacon"
price: "¥5850"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/313296169-sumnacon-2-pcs-8-inch-concealed-security-door-lock-flush
store_origin: JP
region: Japan
---

# 8-inch flush bolt length Automatic holding spring tension Solid stainless steel build Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish

**Brand:** sumnacon
**Price:** ¥5850
**Availability:** ✅ In Stock

## Summary

> 🔐 Elevate your door security with sleek, silent strength.

## Quick Answers

- **What is this?** Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish by sumnacon
- **How much does it cost?** ¥5850 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/313296169-sumnacon-2-pcs-8-inch-concealed-security-door-lock-flush)

## Best For

- sumnacon enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Operation:** Innovative lever switch offers smooth, comfortable use—no more fumbling with push-slide locks.
- • **Heavy-Duty Durability:** Crafted from corrosion-resistant stainless steel to withstand daily wear and ensure long-lasting protection.
- • **Versatile Compatibility:** Perfectly fits French, composite, wood, double, and dummy doors, securing inactive leaves top and bottom.
- • **Hassle-Free Installation:** Includes rust-proof screws and surface strikes for a quick, stable setup that locks in peace of mind.
- • **Seamless Security Integration:** Flush-mounted design blends invisibly with modern doors for a sleek, professional look.

## Overview

The Sumnacon 8-inch Concealed Security Door Lock is a robust, stainless steel flush bolt designed for French, composite, wood, and double doors. Featuring an automatic holding spring and a smooth lever switch, it offers reliable, corrosion-resistant security with easy installation and a modern, concealed finish.

## Description

Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish

## Features

- Flush bolt can be used to secure the opening for composite door, French, patio, wood, double or other doors. This great small device features automatic holding spring to provide tension for both retracted and projected positions. It often be installed on inactive leaf of double door opening (top and bottom) to offer safety function.
- Our flush bolts are all machined from solid stainless steel for anti corrosive and rustproof, heavy duty and sturdy. Installing a flush bolt to make a nice addition to security of your home.
- Size : Length=8"(20cm), Width=0.79"(2cm), Depth = 0.67"(1.7cm). The interior part of the flush bolt is reinforced by screws to enhance stability and fluency of the structure. Install on inactive leaf of double door opening.
- Integrated design of the switch is easy for daily use, Say goodbye to the one with "push just ride and slide" type, this lever type with comfortable touching and concealed style will surely offer you enjoyable usage and match your modern decoration.
- Easy to install,comes with rust-proof screws and surface strikes for installation. Constructed from stainless steel, screws will provide extra strength to engage and interlock firmly so as to be immobile.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Sumnacon |
| Part number | ULSMC01024 |
| Item Weight | 272 g |
| Package Dimensions | 20.7 x 3.99 x 2.39 cm; 272.16 g |
| Item model number | ULSMC01024 |
| Size | 8 inch |
| Color | Silver |
| Style | French |
| Finish | Polished |
| Material | Stainless Steel |
| Shape | Rectangular |
| Item Package Quantity | 1 |
| Number Of Pieces | 2 |
| Special Features | Key Unlock |
| Included components | Screws |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Sumnacon
- **Special features:** Key Unlock
- **Lock type:** Mortise Lock
- **Material:** Stainless Steel
- **Recommended uses for product:** Securing French doors, patio doors, wood doors, and double doors; concealed locking for dummy doors and inactive doors

## Images

![Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish - Image 1](https://m.media-amazon.com/images/I/61+A1sJwAgL.jpg)
![Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish - Image 2](https://m.media-amazon.com/images/I/61Sqz10nXRL.jpg)
![Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish - Image 3](https://m.media-amazon.com/images/I/61hrLJzIrZL.jpg)
![Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish - Image 4](https://m.media-amazon.com/images/I/618ARx0CPaL.jpg)
![Sumnacon 2 Pcs 8 Inch Concealed Security Door Lock - Flush Bolt for French, Composite, Wood, Double, and Dummy Doors - Brush Stainless Steel Finish - Image 5](https://m.media-amazon.com/images/I/5128ROQEjlL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this be installed in the active door of a steel french door?**
A: Yes, that's how I installed mine.

**Q: How does one even install these?**
A: I made a jig with plywood, then pin-nailed it to the doors edge. Set the depth and go at it. Last, clean up the corners with a chisel. Now you’re ready to install the locking mechanism.

**Q: Is the bolt stainless steel as well? screws? are all components stainless and suitable for outdoor use?**
A: Appears to be stainless steel.

**Q: Is this marine grade stainless steel for use on the coast?**
A: Cheap Chinese stainless steel. But for the price it should work

## Frequently Bought Together

- Sumnacon 2Pcs Door Flush Bolts - 8 Inch Concealed Security Door Locks for French Doors,Composite Doors,Wood Doors,Double Doors,Dummy Doors,Brush Stainless Steel Finish
- Ceoighe 2 Pack Flush Bolt for Double Door, 7 Inch Heavy Duty Chrome Plating Flush Latch Bolts, French Door Lock for Inactive Leaf, Double Door Opening and Composite Wood Double Dummy Door

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-30*