Victorian Half Sprung Mushroom Mortice Knob

The Victorian Half Sprung Mushroom Mortice Knob is a face-fix mortice knob with a half-sprung mechanism. It features a Victorian-style mushroom design and is finished in brass. The product is supplied as a pair with fixings.

This mortice knob has a rose diameter of 61mm, a knob diameter of 52mm, and a projection of 71mm from the door face. The half sprung mechanism provides partial spring action in the knob, allowing some return movement after operation without a full spring return.

Key Features

• Victorian mushroom-style mortice knob
• Half sprung operation
• Rose diameter: 61mm
• Knob diameter: 52mm
• Projection: 71mm
• Brass finish
• Face-fix installation
• Supplied as a pair with fixings

Fitment & What to Check

For correct installation, verify the door thickness and ensure compatibility with the existing mortice lock or latch case. The face-fix screws require surface access on the door face for attachment. Check that the knob projection of 71mm will not interfere with surrounding door hardware or door frame components.

Common Ordering Mistakes

• Ordering single knobs instead of pairs when both sides of the door require knobs
• Not confirming the face-fix screw hole positions relative to the door thickness
• Assuming full sprung operation when the knob is half sprung
• Overlooking projection clearance for narrow or recessed door frames