M6–M10 A2 Stainless Steel Flat Head Sleeve Anchor Bolts – Cross & Allen Drive Expansion Screws

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M6–M10 A2 Stainless Steel Flat Head Sleeve Anchor Bolts – Cross & Allen Drive Expansion Screws

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Size: M6*40

Pack Size(pcs): 1

Types: cross

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$2.22 USD

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In stock (500 units), ready to be shipped

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M6–M10 A2 Stainless Steel Flat Head Sleeve Anchor Bolts — Reliable Expansion Fasteners for Concrete & Masonry

Whether you're mounting a handrail to a concrete wall, securing equipment to a masonry floor, or anchoring structural brackets to solid brick, finding a fastener that holds firm without corroding is a constant challenge for contractors, facility managers, and serious DIYers alike. Stripped anchors, rust bleed-through, and mismatched drive types waste time and money on every job.

These flat head sleeve anchor bolts are made from A2 (304) stainless steel and are available in metric sizes M6, M8, and M10, with lengths ranging from 40mm (≈1-9/16") to 100mm (≈3-15/16"). Each bolt features a flat countersunk head and is offered in your choice of Cross (Phillips) or Allen (Hex socket) drive. Pack sizes of 1, 2, 5, 10, and 20 pieces let you order exactly what the job requires.

Typical applications include anchoring wall-mounted shelving and storage systems to concrete or block walls, securing deck posts and pergola bases to concrete footings, and fastening mechanical equipment or electrical panels to masonry substrates — all scenarios where a stainless steel expansion anchor bolt for concrete delivers the corrosion resistance and holding strength the job demands.

🔩 Compatibility: Designed for solid concrete, solid brick, and natural stone. Metric thread standard (ISO) — M6×1.0mm, M8×1.25mm, M10×1.5mm pitch. Not suitable for hollow block, drywall, or wood substrates.

✅ Key Features of These Flat Head Sleeve Anchor Bolts

🦾A2 Stainless Steel Construction — Manufactured from 304-grade stainless steel for dependable corrosion resistance in outdoor, humid, and general industrial environments where carbon steel anchors would rust and fail.
📐Flat Countersunk Head Profile — The low-profile flat head sits flush with or below the surface after installation, making these stainless steel flat head expansion bolts ideal for applications where a protruding head would interfere with fixtures or finishes.
🔄Two Drive Options: Cross & Allen — Choose Phillips cross drive for fast installation with standard drill bits, or Allen hex socket drive for higher torque and reduced cam-out in tight or high-torque applications.
📏Wide Size Range: M6 to M10, 40–100mm — Covers the most common anchor bolt sizes for light-to-medium structural fastening tasks, from M6×40mm (≈1-9/16") up to M10×100mm (≈3-15/16"), reducing the need to source multiple SKUs.
📦Flexible Pack Quantities — Available in 1, 2, 5, 10, and 20-piece packs so you can match your order to the exact scope of the project — no overstocking, no running short mid-job.
⚙️Sleeve Expansion Mechanism — The sleeve expands radially as the bolt is tightened, creating a secure mechanical lock in solid masonry without requiring adhesive or chemical anchoring compounds for most standard load applications.

📐 Technical Specifications — Flat Head Sleeve Anchor Bolts

Material	A2 Stainless Steel (304 grade)
Head Style	Flat (Countersunk)
Drive Type	Cross (Phillips) / Allen (Hex Socket) — select via variant
Thread Standard	ISO Metric Coarse
Thread Diameter	M6, M8, M10
Thread Pitch	M6 × 1.0mm / M8 × 1.25mm / M10 × 1.5mm
Available Lengths	40mm (≈1-9/16"), 50mm (≈2"), 60mm (≈2-3/8"), 70mm (≈2-3/4"), 80mm (≈3-1/8"), 100mm (≈3-15/16")
Pack Size Options	1 / 2 / 5 / 10 / 20 pieces
Suitable Base Materials	Solid concrete, solid brick, natural stone
Finish	Natural stainless (brushed)
Corrosion Resistance	Good — suitable for outdoor and humid environments; see variant options for size-specific data
Country of Origin	See variant options

⚠️ Installation Note: Always drill to the correct diameter and depth for the selected bolt size. Minimum embedment depth and torque values vary by diameter — confirm with the relevant anchor installation standard or a qualified engineer for structural applications.

❓ Frequently Asked Questions

How do I choose the right size sleeve anchor bolt?

Match the bolt diameter to your fixture's hole size — M6 (≈1/4"), M8 (≈5/16"), or M10 (≈3/8"). For length, add the fixture thickness to the minimum embedment depth, which is typically 25–40mm depending on diameter. For example, a 10mm-thick bracket anchored with M8 bolts generally needs at least M8×60mm (60mm ≈ 2-3/8").

What load can these sleeve anchor bolts handle?

Load capacity depends on bolt diameter, embedment depth, and base material strength. In general, M6 anchors in solid concrete typically support several hundred pounds of shear load; M10 anchors can handle significantly more. Always consult a structural engineer for safety-critical applications.

Are these bolts suitable for outdoor or wet environments?

Yes. These are made from A2 (304) stainless steel, which provides good resistance to rust and corrosion in most outdoor and humid environments. For highly aggressive environments such as coastal or chemical-exposure areas, A4 (316) stainless steel is generally recommended.

What thread standard do these sleeve anchors use?

These bolts use standard metric coarse threads (ISO metric). M6, M8, and M10 designations follow the standard metric thread pitch — M6×1.0mm, M8×1.25mm, and M10×1.5mm pitch respectively. They are not compatible with UNC/UNF inch-standard threads.

Cross drive or Allen drive — which should I choose?

Choose Cross (Phillips) drive if you're using a standard power drill or screwdriver — it's the most common and convenient for general installation. Choose Allen (Hex socket) drive if you need higher torque control or are working in tight spaces where a hex key or Allen bit provides better grip and reduces cam-out risk.

Can I use these anchors in hollow block or brick?

Sleeve anchor bolts are generally designed for solid base materials such as concrete, solid brick, or solid stone. In hollow block or cavity brick, the expansion mechanism may not engage properly. For hollow substrates, a hollow-wall anchor or chemical anchor is typically a better choice.

How many pieces do I need to order?

This listing offers pack sizes of 1, 2, 5, 10, and 20 pieces per order. For small repairs or single-fixture installs, a 1- or 2-pack is sufficient. For larger projects such as deck railings, shelving systems, or equipment mounting, the 10- or 20-pack offers better value per piece.

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

M6–M10 A2 Stainless Steel Flat Head Sleeve Anchor Bolts – Cross & Allen Drive Expansion Screws

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Description

M6–M10 A2 Stainless Steel Flat Head Sleeve Anchor Bolts — Reliable Expansion Fasteners for Concrete & Masonry

✅ Key Features of These Flat Head Sleeve Anchor Bolts

📐 Technical Specifications — Flat Head Sleeve Anchor Bolts

❓ Frequently Asked Questions

M6–M10 A2 Stainless Steel Flat Head Sleeve Anchor Bolts – Cross & Allen Drive Expansion Screws

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