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Pan head tapping screw, shape F with recessed head Z DIN 7981, A2 stainless steel, round head, PZ drive, shape F
Pan head tapping screw, shape F with recessed head Z DIN 7981, A2 stainless steel, round head, PZ drive, shape F - 1
Pan head tapping screw, shape F with recessed head Z DIN 7981, A2 stainless steel, round head, PZ drive, shape F - 2

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Pan head tapping screw, shape F with recessed head Z DIN 7981, A2 stainless steel, round head, PZ drive, shape F

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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.