A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included
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A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits IncludedA2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included

A2 Stainless Flanged Button Head Screws M3–M8, ISO7380-2, Hex Bits Included

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In stock (500 units), ready to be shipped

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Description

A2 Stainless Steel Flanged Button Head Screws — ISO7380-2 Allen Socket Bolts M3 to M8

Separate washers slow down assembly and add parts to track. These A2-70 stainless steel flanged button head socket screws (ISO7380-2) solve that problem with an integrated wide flange that distributes clamping load and protects the work surface — no separate washer needed.

Each screw features a low-profile domed button head, a hex socket (Allen key) drive for high-torque installation without cam-out, and a fully threaded shank in A2-70 / 304 stainless steel. Available in M3 through M8 with lengths from 6 mm to 80 mm (approximately 0.24 in to 3.15 in). Correct hex bits are included with every order.

Ideal for outdoor furniture, marine trim, electronics enclosures, automotive bodywork, machine guards, and any visible assembly where a clean, snag-free finish matters.

✅ Compatible with standard metric coarse-thread nuts, threaded inserts, and tapped holes — M3 × 0.5 through M8 × 1.25 per ISO7380-2

A2 Stainless Steel Flanged Button Head Screws ISO7380-2 overview

✅ Key Features of These Flanged Button Head Socket Screws

  • 🔩 Integrated Wide Flange: Built-in flange acts as a flat washer — distributes clamping load, protects the work surface, and eliminates a separate part from your assembly.
  • 🎯 Low-Profile Button Head: Sleek domed profile sits flush or slightly proud for a snag-free, professional finish — ideal for visible assemblies and consumer products.
  • 🔧 Hex Socket (Allen Key) Drive: Allows precise, high-torque installation without cam-out. Correct hex bits (2 mm to 5 mm) are included with every order — no separate tool purchase needed.
  • 🌊 A2-70 Stainless Steel (304 Grade): Excellent corrosion resistance for outdoor, marine, coastal, and food-equipment environments. Will not rust like carbon steel under normal exterior conditions.
  • 🔗 Fully Threaded Shank: Thread runs the entire length for maximum grip and versatility across any material thickness. Length is measured from the underside of the head.
  • 📐 ISO7380-2 Standard: Precision metric coarse dimensions ensure consistent fit and full compatibility with standard metric nuts, inserts, and tapped holes across M3 to M8.

Flanged button head screw dimensions and hex key sizes

🎯 Who Is This For?

🪑 Outdoor Furniture & Garden Builders

The integrated flange and A2 stainless construction make these ideal for decking, garden furniture, and pergola assemblies where corrosion resistance and a clean finish are both required.

⚙️ Machine Builders & Engineers

ISO7380-2 flanged button heads are a standard choice for machine guards, enclosures, and panels where a low-profile head and load distribution are needed without adding a separate washer.

🚗 Automotive & Marine Trim

Body panels, trim pieces, and marine hardware benefit from the snag-free button head profile and the corrosion resistance of A2 stainless — even in coastal and salt-spray environments.

🔌 Electronics & Enclosure Assembly

M3 and M4 sizes are widely used in electronics enclosures, rack-mount equipment, and PCB standoff assemblies where a clean, low-profile fastener is essential.

📋 Technical Specifications — ISO7380-2 Flanged Button Head Screws

Standard ISO7380-2
Material A2-70 Stainless Steel (304 Grade)
Head Style Flanged Button Head (Low Profile Dome)
Drive Type Hex Socket (Allen Key / Internal Hex)
Thread Type Metric Coarse, Fully Threaded
Available Sizes M3, M4, M5, M6, M8
Available Lengths 6 mm – 80 mm (varies by diameter; see variant options)
M3 — Pitch / Head Ø / Head H / Hex Key 0.50 mm / 6.9 mm / 1.65 mm / 2.0 mm
M4 — Pitch / Head Ø / Head H / Hex Key 0.70 mm / 9.4 mm / 2.2 mm / 2.5 mm
M5 — Pitch / Head Ø / Head H / Hex Key 0.80 mm / 11.8 mm / 2.8 mm / 3.0 mm
M6 — Pitch / Head Ø / Head H / Hex Key 1.00 mm / 13.6 mm / 3.3 mm / 4.0 mm
M8 — Pitch / Head Ø / Head H / Hex Key 1.25 mm / 17.8 mm / 4.4 mm / 5.0 mm
Finish Natural Stainless (no coating)
Hex Bits Included Yes — correct size(s) for your order
Quantity per Pack See variant options (20 / 30 / 35 / 40 / 50 / 70 / 100 pcs)

Flanged button head screw application examples

❓ Frequently Asked Questions

Do I still need a washer with these flanged screws?

No. The integrated flange replaces a standard flat washer by distributing the clamping load and protecting the work surface. This saves assembly time and reduces parts count. For extremely soft or delicate materials you can still add a backup washer, but it is rarely necessary.

Are these screws fully threaded, and how is the length measured?

Yes, all sizes are fully threaded for maximum grip. Length is measured from the underside of the head to the tip — it does not include the head height. For example, an M6 × 20 mm screw has 20 mm of threaded shank below the flange.

What hex key size do I need, and are bits included?

M3 uses a 2 mm hex key, M4 uses 2.5 mm, M5 uses 3 mm, M6 uses 4 mm, and M8 uses 5 mm. The correct hex screwdriver bits are included with your order — no need to purchase tools separately.

Are these screws suitable for outdoor and marine use?

Yes. A2-70 stainless steel (304 grade) provides excellent corrosion resistance for outdoor furniture, marine trim, coastal environments, and food-contact equipment. They will not rust like carbon steel under normal exterior conditions. For continuous saltwater immersion, A4 (316) stainless is recommended, but A2 is appropriate for the vast majority of exterior applications.

Will these fit standard metric nuts and tapped holes?

Yes. These screws use standard metric coarse threads (M3 × 0.5, M4 × 0.7, M5 × 0.8, M6 × 1.0, M8 × 1.25) and are fully compatible with any metric nut, threaded insert, or tapped hole of the same size and pitch.

What is the difference between ISO7380-1 and ISO7380-2?

ISO7380-1 is a standard button head socket screw without a flange. ISO7380-2 adds an integrated wide flange under the head, which acts as a built-in washer for better load distribution and surface protection. These screws are ISO7380-2.

Can I use these screws in aluminum or plastic?

Yes. The flanged head is particularly well-suited for softer materials like aluminum and plastic because the wider bearing surface reduces the risk of the head pulling through or crushing the material. For plastic, use the appropriate torque to avoid over-tightening.

🛒 Select your Thread Diameter, Bolt Length, and Quantity above, then add to cart.

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