The part number would be a 56K1SW115-RO. This comes in chemical resistant orange. This part is a key operated surface mounted switch - IP66, 250V 15A single pole.
Clipsal 56 series you can be sure that you have chosen a product that makes no compromise on quality. Our range is the largest of its kind in the world, and every single model in our comprehensive range has an international protection rating of IP56 or IP66. Only clipsal provides different materials for different applications - one material can't do it all. Constructed using specially designed engineering plastics, our products can be used in almost any environment, from warehouses and commercial wash down areas, to heavy industrial and outdoor. Industrial switchgear, being one of the most important components of industry, has to be tough, safe, able to take hard knocks and give reliable performance under many adverse conditions
Please note: all 56K1SW key switches are lockable as standard in the OFF position and once locked in OFF position they cannot be turned ON.
Also comes in a medium security version and common key version.
There is also a version which is lockable in both the "ON" and "OFF" position. The part number for this is 56K2SW115 with the above features.
Please see below link for full range of lockable 56 series switches.