Marutex sheet to sheet overlap
Stainless sheet to sheet overlap screws
Stainless overlap screws for thinner sheet joints
Our Marutex sheet to sheet overlap screws are our stainless solution for joining thinner roofing and cladding sheets where the fixing is made sheet against sheet rather than back into a beam or support. In Unite terminology, this is the Marutex family for stainless stitching screws for roofing and cladding.
This page stays tightly focused on sheet-to-sheet overlap work in thinner sheets. The main choices in the family are the head style, the listed drill-capacity range and whether the joint is better served by the standard hexagon-head options or the pan-head alternative. If you need more help with selection, our guides on clamp length, drilling capacity, corrosion classes and stainless steel are the most relevant next steps.
Choose the right Marutex overlap screw
Hexagon head overlap screws
Choose our hexagon head overlap screws when you want the standard Marutex solution for joining thinner roofing and cladding sheets in exposed conditions. D42 covers the lighter end of the family, while D51 and D61 move you into larger diameters and heavier overlap combinations within the stated drill-capacity ranges, so this is the right starting point for most sheet-to-sheet stitching work.
Pan head overlap screw
Use our pan head overlap screw when the joint detail is better served by a lower, more compact head form instead of a hexagon head. D51K follows the same basic overlap-screw logic as the hexagon alternatives, but gives you a different drive and head format when access, sheet geometry or the finished detail makes that the better choice.
See technical details for our pan head overlap screw D51K on page 10 in the catalogue.
Detailed sheet overlap screw data in our catalogue
The catalogue below gives you the most useful product-level comparison for this family in one place. You can check head style, dimensions, drill-capacity ranges and the available Marutex overlap screw options for thinner sheet joints.
Because this page is intentionally narrow, the viewer should stay focused on the actual sheet to sheet overlap range rather than neighbouring Marutex families. That keeps the page aligned with the product structure on the website and makes selection faster.
Need help choosing the right sheet overlap screw?
We help roofing contractors, sheet metal companies, installers and technical buyers choose the right Marutex overlap screw for the real joint they are building. If you are deciding between D42, D51, D61 or D51K, or if you need to confirm that this is the right Marutex family rather than a beam or board fixing, our team can help you narrow it down quickly.
How do I choose between D42, D51 and D61?
Start with the sheet build-up and drill-capacity range. D42 sits at the lighter end of the family, while D51 and D61 step up into larger diameters and heavier overlap combinations. The right choice is the one that matches the sheets you are actually joining, not simply the biggest screw in the range.
When is D51K the better choice than the hexagon head options?
D51K is the better choice when the detail is better suited to a pan head rather than a hexagon head. The overlap-screw function stays the same, but the head and drive format can make the joint more suitable for certain profiles, access situations or finish requirements.
Why is the free space between thread and head so important on overlap screws?
It matters because overlap screws are designed to gather the sheets together and clamp them in that free space. If that relationship is wrong for the joint, the sheets may not tighten together correctly and the overlap can end up skewed instead of tight and controlled.
Do sheet overlap screws need to be tightened to spin?
Yes. For this family, the screws should be tightened to spin so the sheets are fully collected and clamped in the intended way. Stopping too early can leave the overlap less secure and increase the risk of a poor final fit.
What should I check before choosing a stainless overlap screw for a project?
Check sheet thickness, drill capacity, clamp length and the corrosion environment first. In exposed roofing and cladding work, stainless performance is part of the decision, but it still has to be matched to the actual overlap build-up so the screw works properly during installation.
Can Unite help us choose the right sheet overlap screw for our application?
Yes. We help customers match the screw family to the joint build-up, the installation detail and the environmental requirement. If you send us the sheet combination and the project conditions, we can help you confirm whether this Marutex family is the right fit and which option is the best starting point.