Sandwichpaneelschroeven voor metaal Length (in mm):87mm They have a twofold effect:

They have a twofold effect: they ensure that the drill hole of the self-drilling sandwich panel screws through the roof panels is nicely sealed to prevent leaks

as a watertight shell in swimming ponds

although these will not connect perfectly

to finish the bottom (and possibly the top) cleanly and watertight

stopping odors through the siphon effect of the partition

Sandwichpaneelschroeven voor metaal Length (in mm):87mm They have a twofold effect:Price per box (100 pieces) Sandwich panel screws with metal thread, packed per 100 pieces. Head 8mm metric ( tool bit 8mm also available). Equipped with a heavy drill point with which you can fix the screws in metal up to 4mm thick. The screws have a painted head in RAL7016 anthracite grey, the same color as our stock roof panels and wall panels. On the third photo you can see an overview of which type of screw is recommended for each type of panel.