Self-Tapping Screw with EPDM Washer

The self-tapping screw with EPDM washer is a special roofing fastener with a hex head (8 mm across flats), full-length thread (diameter 4.8–6.3 mm), and a drill point or tip at the end.

The fasteners are made of carbon steel, then coated with a layer of zinc, and the heads are powder-coated according to the RAL color chart. The fasteners are supplied complete with a washer fitted with a synthetic rubber seal.

The self-tapping screw provides high sealing performance and is resistant to temperature fluctuations and precipitation.

Types, applications, installation

Depending on the application, the following types of self-tapping screws with EPDM washer are distinguished.

• For metal. Used for through-fixing of metal roofing sheets and sheet material to metal frames. Screw length ranges from 16 to 150 mm. Roofing sheet thickness is no more than 1.2 mm, base thickness up to 5.6 mm. Depending on the base thickness, installation is carried out with or without pre-drilling.
• For wood. Designed for fastening metal roofing to wooden battens without pre-drilling. The special tip shape ensures easy penetration of the screw into the wood. Fastener length ranges from 29 to 80 mm.
• Universal. Available in two types: with a drill-type tip (for fastening roofing to a metal frame) and pointed tip (for fixing sheet material to a wooden base). Length of universal fasteners ranges from 16 to 150 mm.

A screwdriver with a hex bit or a socket wrench with a magnetic insert is used to drive the fasteners.

FLOK supplies all varieties and the full color range of roofing self-tapping screws with EPDM washer.