Countersunk Self-Drilling Screw

This fastener is a threaded metal rod with a countersunk conical head and a drill-point tip.

A tight single- or double-start metric thread (from 2.9 to 6.3 mm) runs along the entire fastener, up to the head itself. The length of the countersunk self-drilling screw ranges from 13 to 80 mm, the drill diameter is within 2.3-5.8 mm, and the countersunk head diameter is 6.44-12.4 mm.

Carbon steels with high strength properties are used for manufacturing, with an electroplated coating applied on top — white or yellow zinc plating.

Purpose

The versatile countersunk self-drilling screw is used in machine building for joining thin sheet-metal parts to metal bases. In construction, the fasteners are used for fixing profiled sheet and metal roofing tiles.

Installation features

If the part being attached is thinner than 0.6 mm, a hole is pre-drilled for the screw. At sheet thickness from 0.6 to 0.9 mm, drilling is not required: the screw is driven in with a screwdriver and a bit attachment compatible with the cross recess on the head end. Once installed in the working position, the head is sunk into the base and covered with a decorative cap.

Countersunk self-drilling screws are supplied by FLOK. They can be purchased in packs of 1000 or 10000 pieces, or by weight. To place an order, submit an online request or contact a manager.