Indented Hex Washer Self Drilling Farmer Screw Roofing Screw Sandwich Panel Screw with EPDM Bonded Washer
Sandwich panel screws, widely used in roofing projects, so they are also known as roofing screws.
Indented Hex Washer Self Drilling Farmer Screw (Roofing Screw), Sandwich Panel Screw with EPDM Bonded Washer
Thread size ：#10, #12, 1/4 (M4.8, M5.5, M6.3 or particular M6.5)
Length ：19 to 185mm
Finish：Zinc Plated (clear / white / yellow), Coating (Geomet, Dacrotized, Ruspert ,Ceramic coating etc.), Mechanically Zinc plating etc.
Test steel plate thickness 1.6mm to 12mm depends on customers' requirements.
Sandwich panel screws,case harden required,head painted RAL color available.