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

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

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Self-tapping screws are screws that form their own thread. These screws form their own counter thread when screwed into a prefabricated core hole.



Reference values for selecting the correct core-hole diameter are included in DIN 7975.



Shape C = thread with tip


Shape F = thread without tip


Shape R = thread with a 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.