Product Overview: The Fire-Resistant Fastening Solution
Our Zinc Alloy Hammer Drive Anchor (widely known in the trade as the Zamac Nailin, Metal Hit Anchor, or Mushroom Head Anchor) is a light-duty concrete anchor designed for permanent installation. It consists of two parts: a corrosion-resistant die-cast zinc alloy body and a zinc-plated carbon steel (or stainless steel) drive nail.
Unlike plastic wall plugs which can melt or degrade under high heat, this all-metal anchor is totally fire-resistant, making it the mandatory choice for securing fire tracks, emergency lighting, and ceiling clips in commercial buildings. It offers a tamper-proof fixation that, once hammered in, is extremely difficult to remove.
Russian Name: Анкер-гвоздь цинковый / Анкер-клин металлический
Head Style: Mushroom Head (Standard) / Flat Head
Body Material: Zamac 5 Alloy (Zinc-Aluminum-Magnesium-Copper)
Engineering Mechanics & Design
1. The “Hammer-Set” Principle
Speed is money on a construction site. The “Drive Anchor” design eliminates the need for a screwdriver or impact gun.
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Installation: You simply drill a hole, insert the anchor through the fixture, and strike the nail head with a hammer.
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Expansion: As the nail is driven down, it pushes the split sides of the zinc body outward. This expansion creates a powerful friction grip against the walls of the concrete or masonry hole.
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Efficiency: An installer can set 10 of these anchors in the time it takes to screw in 2 standard masonry screws.
2. Why Choose Zamac (Zinc Alloy)?
The body is cast from Zamak, a family of alloys with a base metal of zinc and alloying elements of aluminium, magnesium, and copper.
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Not Plastic: It won’t become brittle in freezing temperatures (cold storage rooms) or soften in hot environments (boiler rooms).
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Shear Strength: Zinc alloy has a much higher shear strength than nylon, preventing the fixture from sliding down the wall under load.
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Corrosion Resistance: Zinc naturally protects itself from rust, and when paired with a galvanized nail, it offers excellent longevity in dry and semi-dry environments.
3. Tamper-Proof Security
Once the nail is driven flush with the mushroom head, there is no drive recess (like Phillips or Torx) to engage a screwdriver. This makes the anchor effectively permanent and vandal-resistant, ideal for securing signage in public spaces or prison facilities.
Detailed Technical Specifications
We produce these anchors using high-pressure die-casting machines to ensure dimensional precision.
| Property | Specification Details |
| Product Name | Zinc Alloy Hammer Drive Anchor, Zamac Nailin |
| Russian Name | Анкер-гвоздь 6×40 / 6×60 |
| Body Material | Zamak 5 Die Cast Alloy |
| Nail Material | Carbon Steel (Zinc Plated) or Stainless Steel (SS304) |
| Diameter | 1/4″ (6mm) – The most popular size |
| Length | 3/4″ (20mm) up to 3″ (75mm) |
| Head Type | Mushroom Head (Low Profile), Flat Head |
| Pull-Out Value | Approx. 200 kg in 3000 psi Concrete (for 1/4″ size) |
| Shear Value | Approx. 250 kg |
| Substrates | Solid Concrete, Solid Brick, Grout-filled Block, Stone |
Application Scenarios
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Roofing Flashing: Securing metal termination bars (membrane strips) to concrete parapet walls.
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HVAC & Electrical: Fastening conduit clips, pipe straps, and junction boxes where fire codes prohibit plastic plugs.
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Drywall Track: Anchoring metal tracks to concrete floors in basement renovations.
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Masonry Ties: Attaching brick ties to concrete columns.
Installation Guide (3 Simple Steps)
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Drill: Use a 1/4″ (6mm) masonry drill bit to drill a hole slightly deeper than the anchor length.
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Insert: Insert the anchor body through the fixture and into the hole. No need to separate the nail from the body.
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Hammer: Strike the nail head until it is flush with the anchor body. The fixture is now locked.
Get a Quote for Wholesale
We export millions of Zamac anchors to North America and Europe annually. Our production capacity allows us to offer extremely competitive pricing on the standard 1/4″ x 1″ and 1/4″ x 1-1/4″ sizes.
We can pack them in “Contractor Packs” (100 pcs/box) or bulk cartons. Please Contact Us to request a sample kit.
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