Flanged Button Head Screws M2–M5 — Built-In Washer, Multiple Materials & Finishes
Loose screws backing out of vibrating assemblies, heads pulling through thin plastic panels, or the hassle of sourcing separate washers for every fastener — these are the everyday frustrations that engineers, fabricators, and hobbyists face when using standard button head screws. These flanged button head screws solve all three problems in a single fastener, with a wide choice of materials and finishes to match your application.
Each screw features an integrated flange beneath the button head, acting as a built-in washer for improved load distribution. Available in five material and finish combinations — Stainless Steel (with or without pre-applied thread-locking glue), Carbon Steel with Black Zinc, Carbon Steel with White Zinc, and Carbon Steel with Bright Nickel plating. Sizes range from M2 × 5 mm (approx. 3/16″) up to M5 × 15 mm (approx. 19/32″), with both Allen (hex socket) and Torx drive options depending on variant. Sold in packs of 100 or 200 pieces.
Typical applications include electronics enclosure assembly where flanged metric screws prevent pull-through in thin panels, RC and drone frame builds requiring vibration-resistant fasteners with thread-locking patch, furniture and fixture assembly using carbon steel flanged bolts for a clean finished look, and light industrial equipment where the integrated flange eliminates the need for a separate flat washer.
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ISO metric coarse thread — fits standard metric tapped holes M2, M3, M4, M5. Not compatible with UNC/UNF inch threads. Allen variants require a metric hex key; Torx variants require a Torx bit (size varies by screw diameter).
✅ Key Features of These Flanged Button Head Screws
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Integrated Flange — Built-In Washer: The flange beneath the button head distributes clamping load over a wider area, reducing pull-through risk in plastic, thin sheet metal, and composite panels without a separate washer.
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Five Material & Finish Options: Choose from stainless steel for corrosion resistance, carbon steel with black zinc for a matte industrial look, white zinc for a brighter finish, or bright nickel for a decorative appearance — all in the same flanged button head form factor.
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Allen & Torx Drive Available: Hex socket (Allen) drive suits standard tooling; Torx drive provides higher torque transfer with reduced cam-out, ideal for production assembly or frequent installation cycles.
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Thread-Locking Glue Option: The stainless steel variant is available with a pre-applied thread-locking patch, preventing loosening in vibrating assemblies without requiring separate Loctite or Nyloc inserts.
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Compact M2–M5 Size Range: Covers the most common small metric fastener sizes from M2 × 5 mm up to M5 × 15 mm, suitable for electronics, robotics, RC builds, and light mechanical assemblies requiring small flanged metric bolts.
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100 or 200 Piece Packs: Order 100 pieces for prototyping or smaller builds, or 200 pieces for production runs and workshop stock — with per-unit cost savings at the higher quantity.
🎯 Who Is This For?
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Electronics & Robotics Builders
The flanged head prevents pull-through in thin PCB standoffs, plastic enclosures, and drone frames — and the thread-locking option keeps screws secure through vibration.
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Makers & Fabricators
Eliminate the separate washer step in your assembly workflow. The integrated flange handles load distribution so you can focus on building, not sourcing extra hardware.
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Furniture & Fixture Assemblers
Carbon steel variants with black zinc, white zinc, or bright nickel finishes deliver a clean, professional look for visible hardware in furniture, cabinetry, and display fixtures.
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Light Industrial & Equipment Maintenance
Ideal for panel mounting, equipment guards, and enclosure assembly where a flanged fastener reduces hardware count and speeds up installation.
📋 Technical Specifications
| Head Type |
Button Head with Integrated Flange |
| Drive Type |
Allen (Hex Socket) and/or Torx — see variant options |
| Thread Standard |
ISO Metric Coarse (M-series) |
| Available Diameters |
M2, M3, M4, M5 |
| Available Lengths |
5 mm (approx. 3/16″) to 15 mm (approx. 19/32″) — shank length, head not included |
| Available Sizes |
M2×5 mm / M3×16 mm / M4×8 mm / M4×9 mm / M4×12 mm / M5×8 mm / M5×15 mm |
| Material Options |
Stainless Steel (with or without thread-locking glue); Carbon Steel / Black Zinc; Carbon Steel / White Zinc; Carbon Steel / Bright Nickel |
| Thread-Locking Option |
Pre-applied patch available on Stainless Steel variant |
| Tensile Strength (typical) |
Stainless Steel: typically 500–700 MPa; Carbon Steel: typically 600–900 MPa (grade dependent) |
| Quantity Options |
100 PCS / 200 PCS |
| Finish |
See variant options |
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Note: Screw length refers to shank length only — the button head is not included in the measurement. Verify thread engagement depth in your application before ordering. For structural or high-load applications, contact us to confirm grade suitability.
❓ Frequently Asked Questions
How do I choose the right length for a flanged button head screw?
For button head screws, the listed length is the shank length only — the head is not included. Measure the thickness of the material being fastened and add any required thread engagement depth in the receiving part. For example, an M4 × 8 mm screw is typically used for panels up to 6–7 mm thick with a tapped hole below. When in doubt, choose a length that provides at least 1.5× the thread diameter in engagement depth.
What is the load capacity of these flanged button head screws?
Load capacity depends on material and size. Stainless steel variants generally offer tensile strength in the range of 500–700 MPa, while carbon steel variants typically range from 600–900 MPa depending on grade. These screws are suitable for light-to-medium duty fastening. For structural or high-vibration applications, contact us to confirm the specific grade and suitability.
Are these screws suitable for outdoor or corrosive environments?
The stainless steel variants offer good corrosion resistance for outdoor and mildly corrosive environments. Carbon steel variants with black zinc or white zinc plating provide moderate corrosion protection suitable for indoor and sheltered outdoor use. The bright nickel finish adds a decorative layer with moderate corrosion resistance. For marine or highly corrosive environments, the stainless steel option is generally recommended.
Are these screws compatible with my existing metric tapped holes?
Yes. These screws use ISO metric coarse thread (standard M-series pitch). M2, M3, M4, and M5 sizes are compatible with standard metric tapped holes and nuts. They are not compatible with UNC/UNF inch-standard threads. Always verify your receiving thread is metric before ordering.
What is the difference between the Allen and Torx drive options?
Allen (hex socket) drive is the most common and works with standard hex keys. Torx (star) drive provides higher torque transfer with less cam-out risk, making it useful in production environments or where screws are driven frequently. Both drive types are available across the size range — select based on your tooling preference and check the variant options for drive type availability per size.
What does the "With Glue" option mean for the stainless steel variant?
The "With Glue" option refers to a pre-applied thread-locking patch on the screw threads, similar in function to a Nyloc insert or Loctite patch. This helps prevent loosening due to vibration without requiring separate thread-locking compound. It is generally used in assemblies subject to vibration or where re-tightening is not practical. The standard stainless steel option does not include this patch.
What is the advantage of the flanged head design over a standard button head?
The integrated flange acts as a built-in washer, distributing the clamping load over a larger surface area. This reduces the risk of the head pulling through softer materials like plastic or thin sheet metal, and eliminates the need for a separate flat washer in many applications. The flange also provides a cleaner, more finished appearance compared to using a separate washer.
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