Product Overview

This document provides technical specifications and details for the B-1705 push-to-close latch knob latch, available in large and small-scale versions.

Dimensions and Mechanical Specifications

• Door thickness compatibility: Large model up to 12.7 mm, Small model up to 9.5 mm.
• Thread specifications: Large model uses 1"-20 thread; Small model uses 3/4"-27 thread.
• Key dimensions include fixed keeper hole center diameters of Ø25.5±0.1 mm (large) and Ø19 mm (small).
• Other dimensional tolerances are provided for door and knob components to ensure proper fit and function.

Material and Surface Treatment

• Lock body is made from Zamak alloy (DIN-EN 1774-ZnAl4Cu1), a zinc-aluminum-copper alloy.
• Surface finishes include bright chrome plating and black powder coating options.

Performance Parameters

• Protection rating: IP40, indicating protection against solid objects greater than 1 mm but no protection against liquids.
• Maximum working load: 560 N for the large model and 330 N for the small model.
• Operating temperature range: -18ºC to 65ºC.
• Flame retardant rating: UL94-HB.

Locking Features

• Available with key locking mechanism using the default CH751 key.
• Non-locking versions are also available.

Additional Notes

For 3D model drawings and further technical details, contact the manufacturer via their website at WWW.FORND.COM.

The document includes detailed dimensional drawings with tolerances to assist in installation and integration into door frames.