š© Grade 10.9 High Tensile Flanged Button Head Screws ā Allen Socket Bolts M3 to M8 | ISO7380-2
š·ļø Brand: HomeDIYer Fastener | ISO7380-2 | Grade 10.9 Steel | Black Uncoated | Hex Bits Included
š Overview ā High-strength fastening with a clean, washer-free finish. When you need serious clamping force and a professional appearance, upgrade to Grade 10.9 High Tensile Flanged Button Head Screws. With a tensile strength of 1040 MPa (151,000 psi), these ISO7380-2 fasteners are significantly stronger than standard stainless steel or Grade 8.8 hardware. The integrated flange eliminates the need for separate washers, distributing load evenly and protecting your work surface. The low-profile button head and hex socket drive allow high torque application without slipping, making them ideal for heavy machinery, automotive components, industrial equipment, and structural assemblies. Fully threaded from M3 to M8, with a black self-color (uncoated) finish. Each order includes the correct hex screwdriver bits. Choose your length and quantity ā built for demanding applications where failure is not an option.
āØ Key Features ā Grade 10.9 Flanged Button Head Socket Screws
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Grade 10.9 High Tensile Alloy Steel ā 1040 MPa tensile strength, 900 MPa yield strength ā ideal for high-stress applications.
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Integrated Wide Flange ā Eliminates the need for a separate washer; distributes clamping load and protects the work surface.
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Low-Profile Button Head ā Sleek domed appearance, snag-free, and perfect for visible assemblies.
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Hex Socket Drive (Allen Key) ā Enables high torque transmission without cam-out; hex bits included (2mm to 5mm).
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Fully Threaded Design ā Maximum grip strength and versatility; length measured from under the head.
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ISO7380-2 Standard ā Precision dimensions for reliable fit with metric nuts and tapped holes.
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Black Self-Color (Uncoated) Finish ā Natural steel with light oil for storage; suitable for dry or oil-lubricated environments.
š Technical Specifications ā Flanged Button Head Screws (ISO7380-2, Metric Coarse)
| Thread Size |
Thread Pitch (mm) |
Head Diameter (mm) |
Head Height (mm) |
Allen Key Size (mm) |
| M3 |
0.50 |
6.9 |
1.65 |
2.0 |
| M4 |
0.70 |
9.4 |
2.2 |
2.5 |
| M5 |
0.80 |
11.8 |
2.8 |
3.0 |
| M6 |
1.00 |
13.6 |
3.3 |
4.0 |
| M8 |
1.25 |
17.6 |
4.4 |
5.0 |
š” Length & ordering info: Screws are fully threaded. Length is measured from the underside of the head (does not include head height). Choose your preferred length (e.g., 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm) ā sold as per your requirement. Hex bits are included with your order.
ā ļø Material note: Grade 10.9 steel offers exceptional strength but is not corrosion-resistant. The black uncoated finish has light oil to prevent rust during storage. For indoor, dry, or oil-lubricated applications (engines, machinery, tooling), these are ideal. For outdoor or wet environments, use stainless steel or apply a protective coating.
ā Frequently Asked Questions ā Grade 10.9 Flanged Button Head Screws
How strong is Grade 10.9 compared to other grades?
š Grade 10.9 has a minimum tensile strength of 1040 MPa (151,000 psi) and a yield strength of 900 MPa. For comparison: Grade 8.8 is 800 MPa, A2-70 stainless is 700 MPa. These are excellent for high-stress bolted joints in machinery, automotive, and structural applications.
Do I need a washer with these flanged screws?
š§ No. The integrated wide flange replaces a standard flat washer, distributing load and protecting the work surface. This saves time, reduces parts, and prevents washer loss.
Are these screws fully threaded? What lengths are available?
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Yes, all sizes are fully threaded for maximum grip. Lengths measured from under the head. Common lengths from 6mm to 50mm. Custom lengths available for bulk orders ā contact us.
Do you include the hex bits? What sizes?
š© Yes, the box includes the correct hex (Allen) bits: M3 ā 2mm, M4 ā 2.5mm, M5 ā 3mm, M6 ā 4mm, M8 ā 5mm. You'll have everything needed to install them right away.
Will these screws rust? Are they suitable for outdoor use?
š§ļø Grade 10.9 steel is not stainless ā it will rust if exposed to moisture. The black uncoated finish has light oil for storage, but for outdoor or wet environments, we recommend applying a rust-preventative coating (paint, zinc spray) or switching to A2/A4 stainless steel flanged button heads. These are best for dry, indoor, or oil-wetted applications.
āļø HomeDIYer Fastener ā High-strength fasteners for demanding applications. Order your exact size, length, and quantity today.
