Countersunk head screw

Details Countersunk head screw Countersunk head screw

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 25/00 (2006.01) F16B 35/06 (2006.01)

Patent

CA 2299795

The invention concerns a countersunk screw with a head (1), a shaft (2) and a thread (3) that extends at least partially over the shaft (2), with the head (1) having a bearing surface (4) that is at least sectionally drawn out towards the shaft (2) in a cone shape. Braking ribs (6) have been set on the upper part (5) of the bearing surface (4), which is away from the shaft (2), and prevent the problem that these screws, when they have been wound in completely or almost completely, especially when mechanical screwdrivers are used, are twisted through and destroy counter threads that have been formed or milled in the material.

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