Atag screw M5 x 12 mm hex socket countersunk (3 pcs) for OSS1/2/3/4: original Atag spare part, type: Screw. Application: Boiler (A203C | vanaf 2008 OSS1). Manufacturer number: S4440000; Instalpunt article number: 8139217.
According to the Atag parts lists, this part fits 94 models, including Atag A203C | vanaf 2008 OSS1, Atag A203EC | vanaf 10-2016 OSS2 and Atag A244CL | vanaf 11-2009 OSS1. The full list is under “Fits”.
This item is in stock and usually arrives within 3–5 working days.
Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer. Work on gas-carrying parts must be carried out by a qualified gas engineer.




