Self-Drill Screw Square Pan Head 4.2 x 13mm (1000 + Tec Bit)

13mm long square pan head self-drilling screws are a type of fastener designed for efficient, quick drilling and secure fastening without the need for pre-drilled pilot holes.

Tec screws come in a box off 1000 inclucing a tec bit.

These screws feature a flat, rounded "pan" shaped head that provides a clean, finished appearance and can distribute pressure evenly on the material.

The square drive on the head ensures better torque transmission and reduces the risk of slipping compared to other drive types like Phillips or slotted.

These attributes make them ideal for connecting ductwork in a ventilation system where speed/ease of installation is critical.