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Bi-Metal Hex Flange Head Concrete Screw Anchors | DISLAB Precision

Bi-Metal Hex Flange Head Concrete Screw Anchors

DISLAB Bi-Metal Concrete Screws are engineered for high-load structural mounting in the most demanding environments. By fusing a corrosion-resistant stainless steel body with a hardened cutting thread, these anchors deliver exceptional clamping force without expansion plugs, ensuring long-term integrity both indoors and outdoors.

ETA Approved Class 4.8 / 6.8 Ruspert 500h/1000h
Bi-Metal Hex Flange Concrete Screws SS316 SS420 Ruspert Coated

Key Features

⚙️ Advanced Material Fusion The dual-material design combines superior corrosion resistance of SUS 304/316 stainless steel with extreme hardness of AISI 420 hardened cutting tip, allowing effortless penetration into high-strength concrete.
🔩 High-Torque Hex Flange Head Integrated washer head distributes clamping pressure evenly across the fixture surface, while hex drive ensures maximum torque transfer and prevents head stripping during heavy-duty installation.
⛓️ Expansion-Free Anchoring Unlike traditional expansion anchors, these screws create mechanical interlock by cutting directly into the substrate. Eliminates expansion stress, permitting installation closer to concrete edges and tighter spacing.
🌀 Optimized Thread Geometry Featuring specialized Hi-Lo or coarse thread design for concrete, maximizing pullout resistance and anti-vibration performance in cracked concrete, solid brick, and natural stone.
🛡️ Industrial-Grade Coating Available in Ruspert coating (500h/1000h salt spray resistance) or plain finish, providing a verified multi-layer barrier against atmospheric corrosion. Ideal for HVAC systems, maritime projects, and industrial machinery.
Bi-Metal concrete screw installation diagram measurement guide

Precision Engineering & Installation Intelligence

Bi-Metal Concrete Screws are made of a hardened carbon drill point welded to a stainless steel body and head. This specification offers outstanding corrosion resistance for all outdoor use in tough environments, combined with a strong, durable drilling point for reliable performance.

DIN Standard / ETA approved for cracked and uncracked concrete. The optimized thread profile delivers consistent holding values and eliminates the need for expansion anchors. The integrated measurement reference ensures each installation meets structural requirements.

  • ✔ Self-tapping cutting thread (non-expansion)
  • ✔ 420 hardened cutting tip for high-strength substrates
  • ✔ Available diameters from M2.5 to M12 / imperial options
  • ✔ Lengths up to 220mm, custom range 10-200mm
Step by step installation process diagram for bi-metal concrete screws

Visual reference: precise mounting sequence from drilling to final torque — no expansion stress, pure mechanical interlock.

Product Specifications

Product NameBi-Metal Hex Flange Head Concrete Screw Anchors
StandardDIN Standard / ETA Approved
MaterialBi-Metal: SUS 304/316 Stainless Steel Body + Hardened AISI 420 Cutting Thread
GradeClass 4.8 & 6.8
Head TypeHex Flange Head (H.W.F) / Hex Washer Head (H.W.H) / Indent Hex Washer Head (with serrations)
Drive TypeHex Nut Drive
Thread TypeCoarse Thread / Hi-Lo Thread for Concrete / UNC
Point TypeSelf-Tapping Cutting Thread (Non-Expansion)
Size RangeDiameter: M2.5 / M3.5 / M3.9 / M4.2 / M4.8 / M5.5 / M6 / M6.3 / M8 / M10 / M12 (#5, #6, #8, #10, #12, #14, 1/4″)
Length: 40mm / 55mm / 70mm / 75mm / 80mm / 90mm / 100mm / 120mm / 150mm / 170mm / 180mm / 200mm / 220mm
Custom Range: 10-200mm
Surface TreatmentPlain Finish / Ruspert Coating (High Corrosion Resistance, 500h/1000h salt spray)
Approved SubstratesCracked and Uncracked Concrete, Solid Brick, Natural Stone, Hollow Block
MOQ1,000 PCS (Negotiable, varies by size) / 10,000 PCS
PackagingPlastic Bag, Plain Box, Plain Carton, Plastic Bucket, Color Box, Color Carton, or Customized Packing
Lead Time15-25 Days
SamplesAvailable upon request

What are Bi-Metal Screws? Bi-Metal screws are made of a hardened carbon drill point that is welded to a stainless steel body and head. This specification offers outstanding corrosion resistance for all outdoor use in tough environments, combined with a strong, durable drilling point for reliable performance.

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