For the Polycarbonate sheeting, we offer the following:

IBR, moderate marine and industrial environment

#12(5.5)X75mm Zap self drilling screw; Hex Flange with Wings; #3 point; Class 2 electroplated

Each

***BAZ Washer required to be used with this fastener***

BAZ625EPDM

6x25mm EPDM BAZ Washer

Class 2

Screws are made from heat treated carbon steel, the screws are heat treated to give added strength. They are then electro plated with a clear or yellow zinc for better corrosion protection. This coating is not normally thick on cheaper methods of coating

5 -8 microns for Class 1 ( Z head marking )

12-14microns for Class 2 ( Z2 head marking)

The zinc coating is vulnerable in marine and industrial environments