Wing Driller 14 gauge-20 threads per inch x 50mm long screw with countersunk head, zinc yellow coating
Wing Driller screws with a countersunk head are for flush fastening timber materials to metal.
The zinc yellow corrosion protection system meets the requirements of ISO 9223 Category 2 (Internal application for mild environments).
AS 3566.2 (Self drilling screws for the building & construction industries) specifies the corrosion protection systems required on screw fasteners Classes 1, 2, 3 & 4 where Class 1 is intended for indoor application and Class 4 for environments up to and including ISO 9223 Category 4 (Severe industrial and severe marine environments).
