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Drilling screw, countersunk milling head with H recessed head
Zinc-plated steel, blue passivated (A3K), with H recessed head
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Drilling, thread forming, screwing in - all in one step
Therefore considerably reduced time and effort
Exact drilling diameter for each screw connection
- Resulting in minimisation of thread tolerance
- Always an optimum connection
Prevents installation errors
Zinc-plated drilling screws must only be used where dampness is not to be expected. For fasteners with construction product approval, the approval, and in particular Part 2 "Special regulations", must always be observed.
Select RAL-colour code
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