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Screws4u Brought To You By Yard Supplies Limited.
Used mainly with drive screw nails and spring head roofing nails for attaching corrugated roofing sheets to wooden purlins. The washer provides a watertight seal when used correctly.
Screws / Metal Construction Screws / Washers, Caps & Sheet Fixings / Dowty Type Washer / Dowty Type Washers