Slotted Dome Head Roofing Screw BZP
Slotted Dome Head Roofing Screw BZP - 16g x 40mm is backordered and will ship as soon as it is back in stock.
Slotted Dome Head Roofing Screws provide an extra-wide clamping surface designed specifically for joining thin roofing sheets, rainwater gutters, and electrical cable trunking. Featuring a low-profile mushroom dome head with a flat underside and a Bright Zinc Plated (BZP) finish, these steel fasteners spread clamping loads evenly to secure delicate substrates without tearing or crushing the material.
Click & Collect from our store in Bridgwater, Somerset
Usually ready in 1 hour
Slotted Dome Head Roofing Screw BZP - 16g x 40mm is backordered and will ship as soon as it is back in stock.
Description
Description
Wide Dome Head Load Distribution
Driving standard narrow bolt heads against thin sheeting creates concentrated pressure points that can easily crush plastics or pull through sheet metal.The large dome (mushroom) head features a broad, flat underside. This gives you the practical advantage of distributing clamping force over a much wider surface area, preventing pull-through and ensuring a firm hold on delicate or thin materials.
Low-Profile Surface Finish
Protruding bolt heads on exterior roofing or interior trunking create snag hazards and look untidy. The smooth, low-profile dome design sits neatly against corrugated panels, cladding, and guttering. This minimizes wind resistance on exterior roofs and provides a clean, unobtrusive finish on exposed indoor installations.
Bright Zinc Plated (BZP) Protection
Roofing hardware is frequently exposed to atmospheric moisture, condensation, and rain. The Bright Zinc Plated finish provides a durable sacrificial layer that shields the underlying steel from rust and oxidation. This ensures your fixings remain structurally sound and free from unsightly rust stains in dry, indoor, and weather-shielded exterior applications.
Traditional Slotted Drive
When working on roofs or elevated scaffolding, switching between specialized driver bits can be slow and inconvenient. The classic slotted drive allows for quick tightening using standard flat-head screwdrivers or standard slotted bit attachments, making on-site installation simple and straightforward.
Specifications
Specifications
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What's in the box?
What's in the box?
Wide load distribution.
Broad dome head spreads clamping pressure to prevent pull-through on thin metal and plastic sheeting.
BZP corrosion resistance.
Bright zinc plating protects steel hardware against rust in dry and weather-shielded environments.
Frequently Asked Questions
Do these dome head roofing screws require a washer?
Do these dome head roofing screws require a washer?
While the wide dome head distributes load effectively on its own, adding a rubber or neoprene EPDM sealing washer is strongly recommended for exterior roofs or guttering to create a 100% watertight seal against rain.
Can I use these on plastic or polycarbonate roof sheets?
Can I use these on plastic or polycarbonate roof sheets?
Yes. The extra-wide dome head is specifically designed to spread clamping pressure, making it ideal for plastics and polycarbonate sheets that would otherwise crack under the narrow head of a standard bolt.
Shipping
What countries do you ship to?
What countries do you ship to?
We currently only ship to the UK. To enquire about shipping to a different destination, please contact us.
How long will it take to receive my order?
How long will it take to receive my order?
Shipping normally takes 1 - 2 days. Orders placed before 2:00pm will be shipped same day. Orders placed after 2:00pm on Fridays will be shipped the following Monday.
