629929 Genuine Spring 4N/mm for Bosch, Siemens, Neff Appliances, BSH Part 00629929 Replacement Spring

Spring 629929 is a genuine BSH part for Bosch, Siemens and Neff appliances with a rated stiffness of 4 N/mm. It is also listed as 00629929. The rating tells you how much force it takes to stretch or compress the spring each millimetre, so a lookalike with a different rating can change how the part it controls behaves. We don't have the appliance or model list on file, so confirm the number before ordering.

Why spring rating matters

Springs in appliances hold doors, balance lids, return levers and keep catches under tension. A rating of 4 N/mm means about 4 newtons of force for every millimetre the spring moves. Springs that look alike can come in several ratings for different versions of a product. Fitting the wrong one can leave a door that slams, a catch that won't hold or a mechanism that feels stiff. A snapped, stretched or rusted spring should be replaced with the exact rating specified for your model.

Part details

• Genuine BSH part 629929, also written 00629929
• Spring rate 4 N/mm
• For Bosch, Siemens and Neff appliances
• No model list on file, confirm by part number

Before fitting the spring

Turn the appliance off at the wall first. Take a photo of how the old spring is hooked or seated, as springs can often go in more than one way. Wear eye protection, since a spring under tension can fly off. Fit the new one to the same anchor points, then work the mechanism several times by hand to make sure it moves freely.

Questions about this part

What does 4N/mm mean?

It's the spring rate. Each millimetre the spring is stretched or compressed takes about 4 newtons of force. A spring with a different rating will feel lighter or stiffer, so replace it with the rating your appliance specifies.