DIN 924 Raised Countersunk Head Slotted Set Screw with Cone Point

Standard DIN 924 covers a set screw with a raised countersunk head and a straight slot. The fastener is designed for joining parts made of metal, plastic and other materials; for joint strength, the end of the screw features a cylindrical cone point. The raised countersunk head shape allows it to sit mostly recessed into the material — it protrudes only slightly above the surface. The fastener is used in mechanical engineering, instrument making and other industrial sectors.

Materials and manufacturing features

The DIN 924 set screw is made of steel, property class 5.8. Brass and stainless steel grades A2 and A4 may also be used for production. Such fasteners are suitable for use in environments with increased corrosive activity.

The fastener has the following characteristics:

• Nominal thread diameter ranges from M1.4 to M3.
• Thread pitch is from 0.3 to 0.5 mm.
• Head size ranges from 2.6 to 5.6 mm.

To increase corrosion resistance, the fastener may be supplied with a protective coating of white or yellow zinc, applied by hot-dip or thermal diffusion galvanizing. A nickel coating may also be used.

Applications

The screw provides a secure connection of parts in a fixed position. The straight slot allows the screw to be driven with a screwdriver or a power driver. Since the head is partially recessed into the material, the joint has a neat appearance. FLOK supplies this type of fasteners and hardware.