Type 17 Top Grip 12-11x50 +Seal B8 Coating

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Type 17 Top Grip 12 gauge-11 threads per inch x 50mm long screw with seal, B8 coating

Type 17 Top Grip screws with seals are for fastening the crest of roof sheeting to timber or thin steel where a water tight seal is required.

Type 17 screws are a self drilling point for fastening into timber. The hardened point will also drill through thin metals up to 0.75mm thick that makes this point suitable for fastening sheets to timber battens. The screw threads extend down the point thus the screw "pulls" itself into the timber that reduces the required drilling pressure and reduces the risk of stripping of threads due to "over running".

The B8 corrosion protection system exceeds the requirements of ISO 9223 Category 4 (Severe industrial and severe marine 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).