M4 x 45mm Slotted Raised Countersunk Screws (DIN 964) - Brass - Box of 200 Slotted Raised Countersunk Self Tapping Screws feature slightly rounded countersunk head and a slotted drive. The slotted drive is the simplest form of screw drive which is designed to be used with a Flat Head Screwdriver, whilst the raised countersunk head provides an attractive finish as well as offering additional drive grip. The self-tapping tip is designed to be used with pre-drilled pilot holes into which the screw will tap its own threads. These Slotted Raised Countersunk Screws are made from Brass which offers both high tensile strength and high corrosion resistance. For larger quantities or custom lengths, please email and one of our team will provide you with a quotation. M4 x 45mm Slotted Raised Countersunk Screws (DIN 964) - Brass - Box of 200