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Tupai Ref. 3957 5SQ interior door handle
Tupai · Privé · Full Square Rose

Ref. 3957 5SQ

Tupai · Made in Portugal

The 3957 on the 5SQ full-square rosette. The most architectural of the three 3957 variants — paired with flush-frame doors and minimalist casing. The 5SQ rose is the largest, fullest square in the Privé range — a deliberate flat plate against the door. Specified on flush-leaf installations where the rosette is meant to read as a piece of architecture in itself, not as a detail to be hidden.

Configure the finish
Black Pearl
Choose function
Passage

Latch only — no locking mechanism. The lever turns the spindle and retracts the latch. Specified for hallways, closets, pantries, and pass-through doors that never need to lock.

Add a lock body
In the details

Portuguese precision in cast zamak.

Material

Cast zamak — Tupai's signature low-pressure zinc alloy. Plated, satin-finished, or PVD-coated for the colour palette.

Finishes

1 published: Black Pearl.

Accessories

Roses, escutcheons, WC turn pieces, and cylinder covers all matched in finish across the rosette family.

Made in

Portugal. Family-owned manufacture by Tupai in Águeda since 1976.

Specification downloads

Drawings & installation guide

Tupai's technical drawing and installation instructions for Ref. 3957 5SQ — dimensions, mounting details, finish codes, and accessory references. Provided by Tupai; shared here for project specification.

Technical drawing

Ref. 3957 5SQ · Drawings & tech info

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Specify this handle

Specify Ref. 3957 5SQ for your project.

Tell us the door, the room, and the cabinetry it sits with. We'll quote the right finish and ship samples to your studio.

Inquire about Ref. 3957 5SQ