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sandwich panel screwsProducts Gallery--Sandwich panel screws Head: Hex washer head or hex flange head Material:22A Headmark: As required Drill point: No.3, No.4, No.5 or No.7 > Coating:White or yellow zinc, Dacromet,Ruspert > Thread: Upper thread 7.0mm or 6.3mm; Lower thread 6.3mm or 5.5mm Upper part BSD threads, Lower part CSD threads or BSD threads, cuts applicable to the lower part threads
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