65mm x 3.35mm galvanised spring head nails supplied in a 10kg trade pack. Used for fixing roofing felt, sarking boards, timber boarding and general sheet material work where a wider head and good holding power are needed.
These 10kg galvanised spring head nails are a staple on roofing jobs and timber cladding work across the UK. The 65mm x 3.35mm size hits a practical sweet spot — long enough to fix through felt and into the substrate with confidence, and with a shank profile that resists pull-through on softer sheet materials. The galvanised coating handles outdoor exposure without rusting out, which matters when you are fixing something that needs to last on a roof for the next two decades.
Spring head nails get their name from the slightly dished, sprung head that compresses slightly on impact and grips the material surface. That design distributes the clamping force across a wider area than a standard round wire nail head, which makes a real difference when fixing bitumen roofing felt, sarking felt, or lightweight timber boarding. You get a firm hold without tearing through the material — something a lost-head nail will absolutely do if you get the angle slightly wrong.
Where Galvanised Spring Head Nails Get Used
Roofers reach for these on felt underlay, timber sarking, and roofing board applications. Builders use them on external timber boarding, rough sawn cladding, and site hoarding. They also crop up in agricultural buildings, fencing work, and anywhere you need a quick, weather-resistant mechanical fix into timber without overthinking the specification.
10kg Pack for Trade Use
A 10kg pack keeps things sensible on site. You are not constantly running to the van for more nails, and the bulk pricing makes the per-nail cost genuinely competitive. Store the bag somewhere dry and sealed between jobs — galvanised nails will last indefinitely when kept out of standing water, but there is no point testing that theory unnecessarily.
Supplied loose, these nails work with most pneumatic coil nailers that accept loose round-head nails in this shank diameter, or by hand with a hammer. Either way, 10kg of 65mm galvanised spring head nails goes a reasonable distance on a standard roofing job.
Pro Tip: When hand-nailing felt with spring heads, drive them just until the head seats flush and compresses slightly against the surface. Driving too hard collapses the spring and you lose the clamping benefit entirely.
Spring head nails at 65mm are used primarily in roofing work, fixing bitumen and synthetic felt underlays to timber sarking and decking boards. They are also used for external timber cladding, site hoarding panels, agricultural shed boarding, and rough sawn timber fencing where a wider head and weather-resistant finish are both needed. Carpenters and general builders reach for them on any job where a standard round wire nail would pull through a softer or sheet material under load.
Best For
Roofing felt and underlay fixing
Timber sarking and decking boards
External timber cladding
Site hoarding and boarding
Agricultural and farm building work
Fencing panels and rough sawn timber
Works With
Bitumen roofing felt
Synthetic felt underlays
Rough sawn softwood timber
OSB and boarding sheet material
Timber sarking boards
Key Specifications
Length: 65mm
Shank diameter: 3.35mm
Head type: Spring (dished)
Finish: Galvanised
Pack weight: 10kg
Application: Hand or pneumatic (loose)
Not suitable for: Not suitable for structural framing connections or applications where a nail specification is prescribed by a structural engineer. The spring head profile is designed for sheet and felt materials and is not a replacement for joist hanger nails, framing nails, or ring shank fixings in load-bearing timber joints.
Mark out your fixing positions and ensure the substrate is clean and dry before you start. For roofing felt, space nails at the intervals recommended for the felt product being used, typically 150mm to 300mm along laps and edges. Drive each nail straight and firm until the head seats flush against the material surface.
Do not overdrive. The sprung head works by compressing lightly against the material, and if you hammer it flush with the shank, you have lost the wider bearing area that stops the nail pulling through. A firm, controlled strike pattern is quicker and more effective than brute force. When fixing thicker boarding, pilot the position with a light tap before driving fully.
Check the substrate is sound, dry, and free of debris before fixing
Position the felt or boarding material and hold or temporarily fix in place
Place the nail point at the fixing position, keeping it perpendicular to the surface
Drive firmly with a hammer or pneumatic nailer until the spring head seats flush and slightly compressed against the surface
Do not overdrive — stop when the head contacts the material
Space fixings to the manufacturer's recommendation for the material being fixed, paying particular attention to laps and edges
Inspect fixed areas for any pulled-through or overdriven heads and replace as needed
Are these nails suitable for use with a pneumatic nail gun?
They can be used with pneumatic nailers that accept loose round-head nails in the 3.35mm shank diameter, but check your nailer's specification first. These are loose nails, not collated strips or coils, so they are only compatible with nailers designed for bulk loose-feed or magazine-fed loose nails in this gauge. Most site work with spring head nails is still done by hand.
How far will a 10kg bag go on a roofing job?
At 65mm x 3.35mm, a 10kg bag contains roughly 650 to 700 nails depending on exact tolerances. For standard felt underlay fixed at 150mm centres along laps and 300mm in the field, a 10kg bag will comfortably cover a moderate-sized domestic roof. Larger roofs or closer nail spacings will require more, so it is worth having a spare bag on site before you start.
Manufactured from steel wire with a hot-dip or electro-galvanised coating to resist corrosion in outdoor and exposed conditions. The spring head profile is formed during manufacture to produce a dished, slightly convex head that compresses on impact, creating a wider bearing area against soft or sheet materials. Shank diameter of 3.35mm provides adequate withdrawal resistance in softwood substrates without splitting thinner boards.
Length
65mm
Shank Diameter
3.35mm
Head Type
Spring (dished)
Material
Steel
Finish
Galvanised
Pack Weight
10kg
Approximate Nail Count
650–700 per 10kg
Size
10kg
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