Hettich HBS 31 FDL Profile Dead Lock – DIN Left/Right, 30 mm Backset

Overview

The Hettich HBS 31 FDL is a mortise lock body designed as a profile dead lock for single-leaf doors. It fits within the door body for discreet, robust locking and is built for both residential and commercial applications, including doors with high usage frequency.

What It Does

This lock body provides the core locking mechanism inside a profile door, using a PZ-85 lock type with handle/knob execution. It works in either left- or right-handed door configurations from the same model (DIN Left/Right), and the latch bolt can be shifted without opening the lock case, simplifying installation and adjustment.

Who It Helps

• Architects, carpenters, and hardware fabricators specifying mortise locks for profile doors
• Homeowners and facility managers needing a durable, reliable dead lock for high-frequency doors
• Door and window fabricators working with single-leaf door systems requiring a standard 85 mm centre-to-centre lock

Key Capabilities

• Lock type: PZ-85, handle/knob (W) execution
• Backset: 30 mm
• Centre to Centre (CTC): 85 mm
• Face plate: Stainless steel, 23 mm width
• Hub: 8 mm
• Lock case: Closed case, iron–milk white coating, zinc-plated material
• Handing: Left/right-handed version available in the same model (DIN Left/Right)
• Latch bolt: Shiftable without opening the lock case
• Suitability: Designed for doors with high usage frequency
• Door type: Profile door, single leaf
• Fire rated: No
• Warranty: 5 years

Product Facts

Buyer Questions This Page Should Answer

Is this lock left- or right-handed?

Both. The HBS 31 FDL is available as a left/right-handed version within the same model, so one product covers both door swing directions.

What backset and centre-to-centre size does it use?

It uses a 30 mm backset with an 85 mm centre-to-centre (CTC) measurement, a common standard for profile door mortise locks.

Can the latch bolt be adjusted after installation?

Yes. The latch bolt is shiftable and can be repositioned without opening the lock case.

What is the lock case made of, and how is it finished?

The lock case is zinc-plated with an iron–milk white coating, while the face plate is stainless steel with an SS finish, giving a 23 mm face plate width.

Is this lock suitable for high-traffic doors?

Yes. It is specifically designed for doors with high frequency of use, making it suitable for both residential and commercial single-leaf doors.

Is this lock fire-rated?

No, this product is not fire rated.

What warranty does it come with?

The Hettich HBS 31 FDL carries a 5-year warranty.

What is the price and is it currently available?

Proof or Trust Signals

• Manufactured under the Hettich brand, a recognized name in door and furniture hardware
• Backed by a 5-year manufacturer warranty
• Stainless steel face plate construction for durability in high-frequency door use

Resources or Next Steps

• View product page: Hettich HBS 31 FDL Profile Dead Lock
• Hettich India Online homepage