A W Hainsworth & SonsWest Yorkshire, GBScope: "...Determination of width BS EN 1773:1997; BS EN ISO 12947-2:2016 BS EN ISO 12947-..."UKAS1certView
ITS Testing Services (UK)Lancashire, GBScope: "...:1997; BS EN 12127:1998 BS EN 1773:1997 Threads/unit length BS EN 1049:Part 2:19..."UKAS1certView