Our range of Zap® self drilling screws is available in a variety of corrosion resistant coatings that conform to SANS1273 specifications. The head markings on the heads of the Zap ® screws indicate the corrosion class of the coating.
Zap® Z5 304 stainless steel self drilling screws are suitable for use in very severe industrial and marine environments. The drill point and first leading threads on the Zap® Z5 304 stainless steel self drilling screws for steel are made out of C1022 hardened steel. Where stainless steel screws are used to fix steel sheeting the use of an insulating sleeve is recommended in order to prevent pit corrosion.
