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Button head hex socket screws (DIN 7380) combine a wide, low-profile dome head with an internal hex (Allen) socket drive, making them the go-to fastener for panel mounting, electronics enclosures, 3D printer frames, CNC machine assembly, bicycle components, and any application where a clean, low-profile appearance matters. Available in M3, M4, and M5 diameters with lengths from 5mm to 30mm, in both A2 stainless steel (corrosion-resistant, silver finish) and black oxide (matte black, light corrosion protection). Pack quantities from 5 to 100 pieces let you order exactly what you need.
The dome head profile provides a larger bearing surface than a standard socket cap screw head, distributing clamping load over a wider area — particularly useful when fastening into softer materials like aluminum, plastic, or wood. The hex socket drive requires a standard Allen key (hex wrench): 2mm for M3, 2.5mm for M4, 3mm for M5. The thread is ISO metric coarse pitch, compatible with standard metric nuts, threaded inserts, and tapped holes.
These screws conform to DIN 7380, the widely recognized German standard for button head hex socket screws, ensuring dimensional consistency and compatibility with standard metric hardware.
| Standard | DIN 7380 |
|---|---|
| Head Type | Button Head (Dome Head / Low-Profile) |
| Drive Type | Hex Socket (Allen / Internal Hex) |
| Thread Standard | ISO Metric Coarse Pitch |
| Available Diameters | M3, M4, M5 |
| Thread Pitches | M3: 0.5mm | M4: 0.7mm | M5: 0.8mm |
| Hex Key Sizes | M3: 2mm | M4: 2.5mm | M5: 3mm |
| Available Lengths | M3: 5–30mm | M4: 6–30mm | M5: 8–30mm |
| Pack Quantity Options | 5 / 10 / 20 / 50 / 100 pcs |
| Finish Options | A2 Stainless Steel (silver) | Black Oxide (matte black) |
| A2 Stainless Material | 304 Stainless Steel — corrosion resistant |
| Black Oxide Material | Carbon Steel with black oxide coating |
| Self-Tapping | No — requires pre-tapped hole or nut |
| Countersinking Required | No dome head sits above the surface |
A button head hex socket screw (also called a dome head or low-profile socket cap screw) has a wide, low-profile rounded head with a hex (Allen) socket drive. Compared to a standard socket cap screw, the button head has a larger bearing surface and a lower profile, making it suitable for applications where clearance is limited or a cleaner aesthetic is desired. It is driven with a hex key (Allen wrench) rather than a screwdriver.
A2 stainless steel (304 stainless) is a corrosion-resistant alloy suitable for outdoor, marine, and food-adjacent applications with a bright silver finish. Black oxide screws are typically carbon steel with a black chemical conversion coating that provides mild corrosion resistance and a dark matte appearance. Black oxide is primarily a cosmetic and light-protection finish — it is not as corrosion-resistant as stainless steel. Choose A2 for corrosion resistance; choose black for aesthetics or indoor applications.
Per DIN 7380: M3 button head screws use a 2mm hex key; M4 button head screws use a 2.5mm hex key; M5 button head screws use a 3mm hex key. These are the standard ISO metric hex socket sizes for DIN 7380 button head screws.
DIN 7380 is a German industrial standard that specifies the dimensions and tolerances for button head hex socket screws. It defines the head diameter, head height, socket size, and thread specifications for metric button head screws. DIN 7380 screws are widely used in machinery, electronics, automotive, and fabrication applications and are compatible with standard metric nuts and tapped holes.
No. Button head screws have a lower head height and a shallower socket depth than standard socket cap screws (DIN 912), which means they have a lower torque capacity and are more susceptible to socket strip-out if over-torqued. Button head screws are suitable for light to medium-duty applications. For high-torque or high-load structural applications, standard socket cap screws (DIN 912) are recommended.
No. These are machine screws with a standard metric coarse thread. They require a pre-tapped hole, threaded insert, or nut. They will not cut their own thread into material.
Button head hex socket screws are used in applications where a low-profile head is needed, such as panel mounting, electronics enclosures, 3D printer frames, CNC machine assembly, bicycle components, furniture hardware, and decorative or visible fastening applications. The wide dome head distributes load over a larger area than a standard cap screw head, making it suitable for softer materials like aluminum, plastic, or wood.
Pack quantities available are 5, 10, 20, 50, and 100 pieces. Select your preferred quantity using the "Amount" selector. Larger packs offer better per-unit value for production or bulk use.
