Unfortunately, there isn’t a specified weight capacity for this product (I’ve checked with the supplier), as it hasn’t been tested to a particular weight. However, this catch is commonly purchased for loft hatch applications. While the fitting doesn’t lock, it does engage and hold securely with the frame-mounted part until the catch is pressed again to release. To ensure the catch functions correctly, it’s essential to use the provided locator part to position the frame-mounted component accurately.