What is the load capacity of these expansion screws?

Load capacity depends on the bolt diameter, embedment depth, and base material strength. Generally, M6 expansion screws in standard concrete (C20) can handle approximately 1.5–3 kN in tension; M8 typically 3–5 kN; M10 typically 5–8 kN. Always consult a structural engineer for safety-critical applications and verify with your local building code.

What thread standard do these expansion screws use?

These screws use standard metric coarse threads (ISO metric). M6, M8, and M10 designations follow the ISO 261 standard, which is widely compatible with metric nuts, washers, and fixtures used in construction and DIY projects worldwide.

What base materials can these expansion screws be used in?

These expansion screws are designed for use in solid concrete, brick, block, and masonry. They are generally not recommended for hollow materials, drywall, or soft substrates without additional anchoring hardware. Always pre-drill a hole matching the bolt's outer diameter for proper expansion.

Which size should I choose — M6, M8, or M10?

M6 is typically used for light-duty fixtures such as cable trays, small brackets, and shelving. M8 suits medium-duty applications like handrails, equipment mounts, and structural brackets. M10 is appropriate for heavier loads such as machinery anchoring, large structural supports, and heavy-duty outdoor fixtures. When load requirements are uncertain, sizing up is the safer choice.

M6 M8 M10 Stainless Steel Expansion Screws — Round Head Phillips Drive, 40–100mm

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M6 M8 M10 Stainless Steel Expansion Screws — Round Head Phillips Drive, 40–100mm

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Size: M6 x 40mm - 304 Stainless Steel

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Stainless Steel Expansion Screws M6–M10 — Secure Anchoring for Concrete & Masonry

Whether you're mounting a heavy bracket to a concrete wall, anchoring equipment to a masonry floor, or securing outdoor fixtures that need to hold through years of weather exposure, a loose or corroded anchor bolt is the last thing you want. These stainless steel expansion screws are built for DIYers, contractors, and maintenance professionals who need a reliable, corrosion-resistant fastener that sets firmly in solid base materials and stays put.

Each set includes round head Phillips drive expansion screws in your selected size and quantity. Available in 304 Stainless Steel (higher corrosion resistance, ideal for outdoor and humid environments) and 201 Stainless Steel (cost-effective for general indoor and sheltered use). Thread diameters range from M6 (≈0.24") to M8 (≈0.31") to M10 (≈0.39"), with lengths from 40mm (≈1-9/16") to 100mm (≈3-15/16"). Quantities available from 1 pc up to 100 pcs per order to suit both single repairs and bulk project needs.

Typical applications include anchoring wall-mounted shelving and storage systems to concrete, securing handrails and safety barriers to masonry, mounting HVAC equipment brackets, installing outdoor lighting fixtures, and fastening cable management trays in commercial or industrial settings — all scenarios where a Phillips expansion bolt in stainless steel delivers lasting performance.

🔩 Compatible with: Solid concrete, brick, block & masonry. Requires pre-drilled hole matching bolt outer diameter. Standard ISO metric thread — works with metric nuts and washers. Not recommended for hollow walls or soft substrates without additional anchoring hardware.

✅ Key Features of These Stainless Steel Expansion Screws

🛡️ Corrosion-Resistant Stainless Steel — Available in 304 and 201 stainless steel grades; the 304 grade resists rust and oxidation in outdoor, humid, and mildly corrosive environments, making it a dependable choice for exterior concrete anchoring applications.
🔘 Round Head Phillips Drive — The domed round head distributes clamping load across a wider surface area, reducing the risk of pull-through on softer fixture materials. The Phillips recess is compatible with standard #2 and #3 Phillips screwdrivers and power drivers.
📐 Wide Size Range — M6, M8 & M10 — Three thread diameters cover light-duty shelf brackets through heavy-duty structural anchoring. Lengths from 40mm to 100mm let you match embedment depth to fixture thickness for a secure, code-compliant installation.
⚙️ Expansion Sleeve Anchoring Mechanism — As the bolt is tightened, the sleeve expands outward against the drilled hole walls, creating a mechanical lock in the base material. This design generally provides consistent holding strength in solid concrete and masonry without adhesive.
📦 Flexible Quantity Options — Order from 1 pc for a single repair up to 100 pcs for large-scale projects. Bulk quantities reduce per-unit cost and ensure you have spares on hand for ongoing maintenance or multi-point installations.
🔧 ISO Metric Thread Compatibility — M6, M8, and M10 threads conform to ISO 261 metric coarse thread standards, ensuring compatibility with standard metric nuts, flat washers, and lock washers commonly used in construction and industrial fastening applications.

📐 Technical Specifications — Stainless Steel Expansion Screws

Product Type	Expansion Screw / Expansion Bolt
Head Style	Round Head (Dome Head)
Drive Style	Phillips (Cross Recess)
Thread Diameter	M6 (≈0.24"), M8 (≈0.31"), M10 (≈0.39")
Length Range	40mm (≈1-9/16") — 100mm (≈3-15/16")
Thread Standard	ISO Metric Coarse (ISO 261)
Material Options	304 Stainless Steel / 201 Stainless Steel
Finish	Natural stainless (brushed/mill finish)
Anchoring Mechanism	Mechanical expansion sleeve
Recommended Base Materials	Solid concrete, brick, block, masonry
Quantity per Order	1, 2, 5, 10, 20, 25, 50, or 100 pcs (see variant options)
Tensile Strength (typical)	See variant options — varies by diameter and grade
Country of Origin	Contact us to confirm

⚠️ Installation note: Always pre-drill a hole matching the bolt's nominal outer diameter. Embedment depth should be at least 4× the bolt diameter for adequate holding strength. Verify load requirements with a qualified engineer for structural or safety-critical applications.

❓ Frequently Asked Questions

How do I choose the right length for my expansion screw?

A general rule of thumb: the embedment depth into the base material should be at least 4× the bolt diameter. For example, an M6 screw typically needs at least 24mm of embedment. Add the thickness of the fixture to get your minimum total length.

M6 × 40mm (≈1-9/16"): suitable for thin fixtures up to ~16mm
M8 × 60mm (≈2-3/8"): suitable for fixtures up to ~28mm
M10 × 80mm (≈3-1/8"): suitable for fixtures up to ~40mm

When in doubt, choose the next longer size to ensure adequate embedment.

What load can these expansion screws handle?

Load capacity depends on bolt diameter, embedment depth, and base material strength. In standard concrete (C20/C25), typical tension values are generally:

M6: approximately 1.5–3 kN
M8: approximately 3–5 kN
M10: approximately 5–8 kN

Always consult a structural engineer for safety-critical or overhead applications, and verify compliance with your local building code.

Are these expansion screws suitable for outdoor or wet environments?

Yes, with the right grade selection. The 304 stainless steel variants offer strong corrosion resistance and are well-suited for outdoor, humid, and mildly corrosive environments — including exterior concrete walls, patios, and covered outdoor structures. The 201 stainless steel variants provide good general corrosion resistance for indoor and sheltered outdoor use. For marine or highly corrosive environments, 316 stainless steel is generally recommended instead.

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

These screws use standard ISO metric coarse threads (ISO 261). M6, M8, and M10 designations are widely compatible with metric nuts, flat washers, lock washers, and fixtures used in construction and DIY projects. They are not compatible with UNC/UNF (inch) thread hardware.

What base materials can I use these expansion screws in?

These expansion screws are designed for solid concrete, brick, block, and masonry. They are generally not suitable for hollow materials (hollow block, drywall, plywood) without additional anchoring hardware. Always pre-drill a clean hole matching the bolt's outer diameter, and clear dust from the hole before insertion for best expansion performance.

Which diameter should I choose — M6, M8, or M10?

M6: Light-duty fixtures — cable trays, small brackets, shelving, electrical conduit supports
M8: Medium-duty — handrails, equipment mounts, structural brackets, fence posts
M10: Heavy-duty — machinery anchoring, large structural supports, heavy outdoor fixtures

When load requirements are uncertain, sizing up is the safer choice. Contact us if you need help selecting the right size for your project.

What is the difference between 304 and 201 stainless steel for these bolts?

304 stainless steel contains higher nickel content (typically 8–10.5%), giving it superior corrosion resistance — the right choice for outdoor, coastal, or humid environments. 201 stainless steel uses manganese in place of some nickel, making it a cost-effective alternative with good corrosion resistance for general indoor and sheltered applications. For long-term outdoor exposure or environments with salt air, 304 is the recommended grade.

Can I reuse these expansion screws after removal?

Generally, expansion screws are not designed for reuse. Once the sleeve has expanded inside the base material, removing and reinstalling the bolt in the same hole will typically result in reduced holding strength. For a new installation, a fresh bolt and a new pre-drilled hole are recommended to ensure reliable anchoring performance.

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M6 M8 M10 Stainless Steel Expansion Screws — Round Head Phillips Drive, 40–100mm

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Beschreibung

Stainless Steel Expansion Screws M6–M10 — Secure Anchoring for Concrete & Masonry

✅ Key Features of These Stainless Steel Expansion Screws

📐 Technical Specifications — Stainless Steel Expansion Screws

❓ Frequently Asked Questions

M6 M8 M10 Stainless Steel Expansion Screws — Round Head Phillips Drive, 40–100mm

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