How to choose a metal threaded screw?

Metal threaded screws are used to make connections between metal parts and are available in different materials, heads and recesses depending on the element to be fastened. Slotted screws and screws with a “Ph” imprint are used in both metal and wood. They differ in the tightening torque required during installation.


Metal threaded screws: head types and characteristics

The different types of heads and recesses offer versatility in assembly when selecting the right product:

• DIN 84 screws with cylindrical head and slotted footprint are used in joints requiring secure and stable fastening.
• DIN 7985 screws with round head and “Ph” recess are used for connections, mainly made of sheet metal or aluminium, such as doors, fittings, profiles or roofs.
• DIN 963 and DIN 965 screws with countersunk head and slotted and “Ph” recess, respectively, are ideal for fastenings where the screw must be integrated into the surface.