Unlike door locks, crescent locks are specifically designed for PVC and aluminum alloy sliding windows, named for their crescent-shaped bolt. This lock utilizes a spring mechanism to achieve 180° or 360° rotation.
"3H Hardware • Harmony in Diversity" – We anticipate gathering with industry colleagues to explore the boundless possibilities of architectural hardware together! November 5-6, at Booth 202, Hall W1 – We look forward to welcoming you!
3H Hardware Architectural Hardware will seize this visit as an opportunity to continuously intensify technological innovation and intelligent construction, working hand-in-hand with the association to propel the high-quality development of the architectural door and window accessories industry.
Choosing reputable brands often provides more assurance regarding material quality and after-sales service. Although the initial investment might be slightly higher, the durability and reliability offered can prevent the hassle of frequent replacements in the long run.
Deeply understanding and strictly implementing their standard requirements is a wise practice for ensuring building safety at the source and fulfilling safety responsibilities. Equipping every fire door with compliant, high-quality hardware means adding a solid layer of protection to life safety passages.
MQS03
3H INC.
Product Description
Item No. | MQS03 |
Size | / |
Application | Curtain wall top hung window |
Open force | 1800N |
Material | stainless steel/zinc alloy |
Surface Treatment | powder coating |
Color | Optional |
Components | screws |
Function | durable,easy-installation,smooth-operation |
Specification

Item No. | Item name | Remark |
1 | Fork handle | Optional |
2 | Connecting rob | / |
3 | Corner Device | / |
4 | Connecting block | Increase the lockable points in accordance with the regulation of window sash |
5 | Pneumatic positioning stay | Selection as per the regulation of window sash |
6 | Elevating block | / |
7 | Hung window friction stay | Non-hook top hung window should be installed with this product |
1) The system is under the locked status while the handle shaft is 0 degree;
2) When the shaft is rotated to 90 degrees, the system is unlocked, meanwhile, under the assistance of pneumatic position stay, it needs to be pushed lightly to open the window sash.
3) Open the window sash to the advanced position, then rotate the handle shaft to 0 degree, at this moment, the system is locked automatically, while the window sash bears the wind pressure to some content the window will be closed automatically, the locking component will be locked automatically to prevent the window from damaged.
Operation Steps
1) The system is under the locked status while the handle shaft is 0 degree;
2) When the shaft is rotated to 90 degrees, the system is unlocked, meanwhile, under the assistance of pneumatic position stay, it needs to be pushed lightly to open the window sash.
3) Open the window sash to the advanced position, then rotate the handle shaft to 0 degree, at this moment, the system is locked automatically, while the window sash bears the wind pressure to some content the window will be closed automatically, the locking component will be locked automatically to prevent the window from damaged.
