Slotted raised countersunk head screws ISO 2010-brass chrome-plated M4x16 mm

Slotted screw drives are the oldest form of rotary drives for fastening screws. The Schltz is usually manufactured in a pressed or milled version. Because of its uneconomical processing method (slow, unwieldy), the slot is increasingly disappearing in favor of other drives (hexagon socket, cross slot, hexagon socket).

Brass is a copper-zinc alloy containing at least 50 per cent copper by mass and up to 45 per cent zinc. Other metals are added to impart specific properties to wrought and cast alloys. Brass is wear-resistant, corrosion-resistant, easily formed both hot and cold, and can be polished. Wrought alloys are used in deep-drawn parts, screws, springs, tubes and instrument components, whilst cast alloys are used in valve bodies, plain bearings and precision engineering components.

Chrome plating is carried out in accordance with DIN EN ISO 1456 Metals such as steel, stainless steel, aluminum, bronze, iron, brass, copper and die-cast zinc can be chrome-plated. The chrome surface is applied to a thick nickel undercoat. This is a durable and robust application that is less susceptible to wear and scratches.