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Raised countersunk tapping screw, C shape with Z recessed head DIN 7983, A2 stainless steel, plain, shape C, with Z cross recess.
Raised countersunk tapping screw, C shape with Z recessed head DIN 7983, A2 stainless steel, plain, shape C, with Z cross recess. - 1
Raised countersunk tapping screw, C shape with Z recessed head DIN 7983, A2 stainless steel, plain, shape C, with Z cross recess. - 2

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Raised countersunk tapping screw, C shape with Z recessed head DIN 7983, A2 stainless steel, plain, shape C, with Z cross recess.

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Tapping screws belong to the thread-moulding screw family. When screwed into a pre-prepared core hole, these screws shape their own counter-thread.



Guideline values for selecting the correct core hole diameter are contained in DIN 7975.



Shape C = thread with tip


Shape F = thread without tip


Shape R = thread with rounded tip

Notice

Stainless steel tapping screws are weaker than case-hardening steel tapping screws. This means that these screws cannot form a counter thread in sheet steel. For this reason, they are used in soft materials such as aluminium only.