M6-M12 Stainless Steel Expansion Anchor Bolts for Concrete & Masonry

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M6-M12 Stainless Steel Expansion Anchor Bolts for Concrete & Masonry

Name: M6-M12 Stainless Steel Expansion Anchor Bolts for Concrete & Masonry
Brand: HomeDIYer
Price: 8.77 USD
Availability: InStock

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Size: M6x40mm

Pack (Pcs): 5

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M6–M12 Stainless Steel Expansion Anchor Bolts — Reliable Holding Power in Concrete & Masonry

When a standard screw won't cut it and you need a fastener that locks into concrete, brick, or block wall, the wrong anchor can mean a failed mount, a dropped shelf, or worse. Contractors, maintenance crews, and serious DIYers who work with masonry regularly know that the anchor is only as good as its material and its fit — and that's exactly where these M6–M12 stainless steel expansion anchor bolts deliver.

Each set contains sleeve-style expansion anchor bolts machined from 201 stainless steel, available in thread diameters M6, M8, M10, and M12, with lengths ranging from 40mm (≈1-9/16") to 150mm (≈5-7/8"). Pack quantities range from 1 to 50 pieces so you can grab exactly what a single repair needs or stock up for a full installation run. The metric coarse thread profile (ISO standard) is compatible with standard metric nuts and washers.

Typical applications include anchoring structural brackets to concrete columns, securing electrical conduit hangers to brick walls, mounting HVAC equipment to masonry slabs, and fastening railing posts to concrete footings — anywhere you need a masonry anchor bolt for concrete that won't back out under vibration or load.

🔩 Compatibility: Designed for solid concrete, brick, and dense masonry. Thread standard: Metric coarse (ISO 68-1) — M6 (1.0mm pitch), M8 (1.25mm), M10 (1.5mm), M12 (1.75mm). Compatible with standard metric nuts and flat washers.

⚠️ Before ordering: Measure your fixture thickness and required embedment depth to confirm the correct bolt length. If you are unsure, see the FAQ below or contact us to confirm.

✅ Key Features of These Stainless Steel Masonry Expansion Anchor Bolts

🦾Sleeve Expansion Mechanism — The anchor sleeve expands radially as the bolt is tightened, creating a mechanical lock against the hole wall for secure holding in concrete and brick without adhesive.
🌊201 Stainless Steel Construction — Resists rust and surface oxidation in outdoor, humid, and mildly corrosive environments, making these concrete wall anchor bolts suitable for both interior and exterior installations.
📐Wide Size Range M6–M12 — Covers the most common metric anchor bolt sizes for masonry, from light-duty M6×40mm (≈1/4"×1-9/16") up to heavy-duty M12×120mm (≈1/2"×4-3/4"), reducing the need to source multiple SKUs.
🔧Standard Metric Coarse Thread — ISO 68-1 thread profile pairs with any standard metric nut or washer; no proprietary hardware required for installation or replacement.
📦Flexible Pack Quantities — Available in packs of 1, 2, 4, 5, 10, 20, 25, or 50 pieces so you can match your order to the job size — single repair or bulk installation run.
⚡Straightforward Installation — Drill a matching-diameter masonry hole, clear the dust, insert the anchor, and torque the nut — no epoxy, no curing time, no special tools beyond a hammer drill and standard wrench.

📐 Technical Specifications — Masonry Expansion Anchor Bolts

Product Type	Sleeve Expansion Anchor Bolt
Material	201 Stainless Steel
Thread Standard	Metric Coarse (ISO 68-1)
Available Diameters	M6 (≈1/4"), M8 (≈5/16"), M10 (≈3/8"), M12 (≈1/2")
Available Lengths	40mm (≈1-9/16") to 150mm (≈5-7/8") — see variant options
Thread Pitch	M6: 1.0mm \| M8: 1.25mm \| M10: 1.5mm \| M12: 1.75mm
Recommended Drill Bit	Carbide-tipped masonry bit matching bolt diameter
Compatible Base Materials	Solid concrete, brick, dense masonry
Finish	Mill finish stainless (no coating)
Pack Quantity Options	1, 2, 4, 5, 10, 20, 25, 50 pcs — see variant options
Drive / Installation	Nut-driven (standard metric wrench or socket)
Tensile Load Capacity	See variant options / Contact us to confirm for your application

❓ Frequently Asked Questions

How do I choose the right bolt length for my project?

A general rule: the embedment depth into the base material should be at least 4× the bolt diameter. For M6, aim for at least 25mm (≈1") of embedment; for M12, at least 50mm (≈2"). Add the fixture thickness to get your total bolt length. For example, mounting a 10mm bracket with M8 bolts typically calls for M8×60mm or longer.

What load can these expansion anchor bolts handle?

Actual load capacity depends on base material strength, embedment depth, and edge distance. In standard concrete (C20/25), M6 anchors typically handle 1–2 kN in tension; M12 anchors can generally reach 5–8 kN. Always consult a structural engineer for safety-critical applications.

Are these bolts suitable for outdoor or wet environments?

Yes. Made from 201 stainless steel, these anchors offer good corrosion resistance for most outdoor and humid environments. For highly aggressive environments — coastal salt air, chemical exposure, or constant submersion — 316 stainless steel is generally recommended instead.

What thread standard do these bolts use, and are they compatible with standard hardware?

These use standard metric coarse threads (ISO 68-1). M6 has a 1.0mm pitch, M8 has 1.25mm, M10 has 1.5mm, and M12 has 1.75mm. They pair with any standard metric nut, flat washer, or lock washer — no proprietary hardware needed.

What base materials can I use these anchors in?

These expansion anchors are designed for solid concrete, brick, and dense masonry. They are generally not recommended for hollow block, aerated concrete (AAC/Ytong), or soft/crumbling masonry without engineering review, as the expansion mechanism requires solid material to grip against.

Do I need a special drill bit or tool to install these?

Use a carbide-tipped masonry or hammer drill bit matching the bolt diameter (e.g., 6mm bit for M6, 10mm bit for M10). Drill to the required depth, clear the hole of dust with a brush or blow-out bulb, insert the anchor, place your fixture, and tighten the nut to expand the sleeve. No epoxy or curing time required.

How do I convert these metric sizes to inches?

Diameter: M6 ≈ 1/4", M8 ≈ 5/16", M10 ≈ 3/8", M12 ≈ 1/2". Length conversions: 40mm ≈ 1-9/16", 50mm ≈ 2", 60mm ≈ 2-3/8", 70mm ≈ 2-3/4", 80mm ≈ 3-1/8", 90mm ≈ 3-9/16", 100mm ≈ 3-15/16", 120mm ≈ 4-3/4", 150mm ≈ 5-7/8".

🛒 Select your size and pack quantity above, then add to cart — ships from our US warehouse.

M6-M12 Stainless Steel Expansion Anchor Bolts for Concrete & Masonry

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M6–M12 Stainless Steel Expansion Anchor Bolts — Reliable Holding Power in Concrete & Masonry

✅ Key Features of These Stainless Steel Masonry Expansion Anchor Bolts

📐 Technical Specifications — Masonry Expansion Anchor Bolts

❓ Frequently Asked Questions

M6-M12 Stainless Steel Expansion Anchor Bolts for Concrete & Masonry

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