Hinged Plastic Pull Lock

The Ultimate Solution for Lightweight Sashes and Skylights;
The Wika Concealed Polymer Casement Catch (Snapper), featuring a compact, low-profile design, delivers smooth and effortless operation for your fenestration systems.
Eliminating the need for bulky handles, it offers quick installation and precise adjustment—making it the ideal choice for hopper windows, clerestory openings, and access panels.

This product has only one variant.

Description

Wika Polymer Casement Catch (Snap Catch)

Product Overview & Mechanical Functionality:

The Wika Polymer Casement Catch (also known as a Snap Catch or Hidden Sash Latch) is a non-leveraged, push-to-lock mechanical system engineered specifically for lightweight casements, shutters, and aluminum profiles. Its functionality relies on a precision-fit, two-component locking mechanism:

Flexible Female Socket: Designed with a dual-fork geometry and calibrated elasticity to absorb impact and securely lock the pin.
Male Pin (Keeper): A reinforced pin that anchors into the socket’s terminal groove under pressure, providing high resistance against wind loads, vibration, and sash weight.

Key Applications:

Hopper & Transom Windows: The optimal solution for bathroom, stairwell, and industrial/mechanical room windows where lever handles or espagnolettes are non-essential.
Minimalist Architecture: Completely conceals hardware behind the sash to maintain clean sightlines in frameless or hidden-frame systems.
Passive Sash Stabilizer: Used as a secondary latch for French-door inactive sashes to prevent vibration and ensure consistent EPDM gasket compression.
Inspection Panels: Facilitates tool-free, rapid access to mechanical/curtain wall services.

Engineering Advantages:

Installation Efficiency: No heavy milling or specialized punching required; installs rapidly with standard self-tapping screws.
Millimetric Adjustment: Features slotted holes in the male pin base, allowing installers to fine-tune the engagement depth to match EPDM gasket compression precisely.
Fatigue Resistance: Manufactured from industrial-grade polymers to prevent material fatigue or “socket stretching” over thousands of cycles.
Silent Operation: Superior shock absorption compared to metal catches, eliminating metal-on-metal noise.

FAQ:

Q1: Is it compatible with thermal break profiles?A: Yes. This catch is universal and compatible with all normal and thermal break profiles, including Eurogroove and custom proprietary channels.
Q2: Does it rust?A: No. Made from high-performance polymers, it is completely immune to rust, oxidation, and galvanic corrosion, even in 100% humidity environments.