Hettich HFB 4: Automatic Flush Bolt

Overview

The Hettich HFB 4 is an automatic flush bolt designed for double door installations, primarily on wooden doors. It automatically unlocks the passive leaf when the active leaf is opened, removing the need for manual bolt operation. The fitting is finished in stainless steel satin for a modern, understated look and carries a 2-year warranty.

What It Does

• Automatically unlocks the passive door leaf when the active leaf opens, enabling seamless double-door operation.
• Provides DIN left/right usability, so it fits either door orientation without needing a handed-specific part.
• Enhances door security while keeping day-to-day operation simple for double-leaf wooden doors.

Who It Helps

• Homeowners and builders installing double doors (wooden) who want synchronized, low-effort locking.
• Architects and interior contractors specifying door hardware that pairs security with a clean stainless steel satin finish.
• Hardware retailers and dealers sourcing branded flush bolts for resale or project supply.

Key Capabilities

Buyer Questions This Page Should Answer

What does the HFB 4 automatic flush bolt do?

When the active door leaf is opened, the HFB 4 automatically releases the passive leaf's bolt, so the second door leaf doesn't need to be manually unlocked before use.

Is it suitable for any door type?

It is specified for wooden doors in double door applications.

Does it work on both left- and right-hand doors?

Yes, it is DIN left/right usable, meaning the same unit fits either door hand orientation.

What finish and material is it available in?

It is made of stainless steel with an SS Satin finish.

What size should I check for fitting?

The unit measures 158 mm x 41 mm; confirm this fits the intended door and frame before ordering.

What warranty does it carry?

Hettich backs the HFB 4 with a 2-year warranty.

What is the price and is it currently available?

Where is it manufactured?

Country of origin is China.

Proof or Trust Signals

• Sold under the Hettich brand, a recognized name in door and furniture fittings.
• Backed by a 2-year manufacturer warranty.
• SKU-tracked (9228400) for consistent ordering and inventory reference.

Resources or Next Steps

• View or purchase the Hettich HFB 4 Automatic Flush Bolt
• Browse more Hettich Fittings online