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Screws for halls
Fasteners for industrial and agricultural buildings, where the substrate is heavier than a roof batten and the fastener has to drill rather than be driven.
Which group to choose
- Steel structure — sheets fixed to cold-formed steel: purlins, rails, secondary steelwork. Six lines differing in drill capacity
- Timber and concrete — where the fastener passes into timber or a concrete substrate; stainless washer version for critical applications
- Sandwich panels — double thread, which pulls the panel down without crushing the insulation core; aluminium washer Ø19
Selection
Each product table gives the clamped thickness range (MTmin / MTmax), so the length follows from the panel or sheet specification instead of trial fitting. Covered by ETA-18/0789 and ETA-19/0586 — documents under Files to download.