Multipurpose screw

A multipurpose screw comprising:

• a head having a tool engaging formation;
• a self-drilling drill tip, the drill tip including a tip end having a chamfer with an included angle of between 80 and 120 degrees, and the tip end including opposed leading faces and associated thread flutes;
• a shank extending between the head and the drill tip, and including a threaded portion and an unthreaded portion, the threaded portion including a major thread extending from the drill tip, wherein the ratio between the major diameter of the major thread and the pitch of the major thread is from 1.2 to 2.4;
• wherein the threaded portion includes a secondary, low thread extending from the drill tip to define with the major thread a high/low thread which does not extend along the shank for as far as the major thread;
• wherein the major thread is formed with a series of swarf indents defining at least one swarf channel;
• and
• wherein the thread flutes terminate at the threaded portion.