42mm Survey Nails Box of 100

Hardened steel masonry nails with a recessed centre point for high-precision marking. Zinc-plated for corrosion resistance and supplied with a steel support washer, these durable nails are ideal for site engineers and surveyors needing permanent benchmarks on hard surfaces like concrete and tarmac.

Superior Durability: Manufactured from high-strength, zinc-plated steel to resist corrosion and withstand heavy impact in hard ground.

Maximum Visibility: Features a large, flat head with a distinct center mark for precise prism pole placement and easy location.

Versatile Use: Engineered for permanent or temporary setting-out on asphalt, tarmac, and timber, ensuring secure fixings for every site.

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FAQs

How do these compare to Hilti survey nails?

These nails offer a highly cost-effective alternative to Hilti nails while maintaining the same hardened steel quality. While Hilti nails are often designed for specific brand-only tools, our nails are versatile enough for both manual hammering and standard gas-actuated nailers.

What quantities do these nails come in?

Every size in the range is supplied in a professional box of 100. This makes them easy to store in site vehicles and ensures groundworkers have enough stock for large-scale setting-out tasks.

Which size should I choose for tarmac?

The 27mm or 32mm sizes are most popular for standard road surfaces. For softer ground or where extra grip is needed, the 42mm or 47mm options provide deeper penetration and better long-term stability.

Are these nails resistant to rust?

Yes. All our survey nails are zinc-plated. This protective coating prevents corrosion, ensuring that your survey marks remain visible and structurally sound throughout the duration of a civil engineering project.

Do I need a special tool to install them?

No. While they are compatible with many nail guns, they can be driven into most surfaces by hand using a standard club hammer, making them a flexible choice for utility teams.

What is the purpose of the recessed centre point?

The indent in the head is designed to hold the tip of a surveyor’s plumb-bob or prism pole. This ensures the instrument is perfectly centred over the mark, which is vital for high-precision surveying.

Will the washers stay in place?

Yes. The nails are supplied with tight-fitting steel support washers that sit flush against the surface. This prevents the nail from being pulled through and makes the mark much easier for surveying companies to locate.

Can these be used on steel surfaces?

Due to their hardened carbon steel construction, these nails can be driven into structural steel and sandstone, making them a multi-purpose fixing for complex civil engineering environments.

How should I colour-code these marks?

The standard box comes with steel washers. For increased visibility or colour-coding specific utilities, many groundworkers use these nails in conjunction with our coloured survey discs or marker paint.

Can I not just use masonry nails instead of survey nails?

Standard nails often use softer steel that bends or shatters on impact. Our survey nails are specially hardened and tempered to penetrate high-strength concrete. They also feature a precise recessed centre point, ensuring sub-millimetre accuracy for optical instrument setups.