🔩A2 Stainless Steel Button Head Allen Screws - Hex Socket Bolts M3 to M10 | HomeDIYer
Add sleek, low-profile fastening to your projects with our premium A2 stainless steel button head Allen screws! These elegant hex socket dome bolts combine a rounded, decorative head with the high-torque capability of hexagonal socket drives. Perfect for machinery, automotive, electronics, and furniture where aesthetics and functionality matter. ISO7380 compliant, corrosion-resistant, and available in six sizes from M3 to M10.
✨Sleek & Decorative Design: The rounded, low-profile button head provides a smooth, attractive finish that's ideal for visible applications while offering more clearance than flat or pan head screws.
📏 Available Button Head Screw Sizes
M3
2mm Allen Key
5.7mm Head
M4
2.5mm Allen Key
7.6mm Head
M5
3mm Allen Key
9.5mm Head
M6
4mm Allen Key
10.5mm Head
M8
5mm Allen Key
14mm Head
M10
6mm Allen Key
17.5mm Head
🔍 Button Head vs Socket Head Comparison
🔩
Socket Head
• Taller cylindrical head
• Higher strength
• Less head clearance
• Industrial look
🔑 Required Allen Key Sizes
Hex Key / Allen Wrench Sizes Needed:
📊 Detailed Button Head Screw Specifications
| Size |
Thread Pitch |
Head Diameter |
Head Height |
Allen Key |
| M3 Button Head |
0.5 mm |
5.7 mm |
1.65 mm |
2 mm |
| M4 Button Head |
0.7 mm |
7.6 mm |
2.2 mm |
2.5 mm |
| M5 Button Head |
0.8 mm |
9.5 mm |
2.75 mm |
3 mm |
| M6 Button Head |
1.0 mm |
10.5 mm |
3.3 mm |
4 mm |
| M8 Button Head |
1.25 mm |
14 mm |
4.4 mm |
5 mm |
| M10 Button Head |
1.5 mm |
17.5 mm |
5.5 mm |
6 mm |
Material: A2-70 Stainless Steel Standard: ISO7380 Drive: Hex Socket (Allen) Head: Button Head (Dome) Thread: Fully Threaded Finish: Untreated (Natural)
✨ Key Features of Stainless Steel Button Head Screws
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Aesthetic Design: The rounded button head provides a sleek, finished appearance ideal for visible applications.
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Corrosion Resistant: A2-70 (304) stainless steel construction offers excellent rust resistance for indoor and outdoor use.
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High Torque Capability: Hexagonal socket drive allows for greater torque application than slotted or Phillips heads.
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Low Profile: Shorter head height compared to socket head cap screws provides more clearance in tight spaces.
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Fully Threaded: Threads run the entire length for maximum engagement in various material thicknesses.
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Standard Compliant: Manufactured to ISO7380 standards ensuring precise dimensions and reliable performance.
🔧 Ideal Applications for Button Head Allen Screws
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Machinery & Robotics: CNC machines, 3D printers, and automation equipment where aesthetics matter
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Automotive & Motorcycle: Custom builds, accessories, and visible components
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Furniture & Cabinetry: High-end furniture, display cases, and visible hardware
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Electronics & Audio Equipment: Enclosures, panels, and consumer electronics
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Bicycle Components: Brake systems, derailleurs, and custom modifications
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DIY & Custom Projects: Model building, prototypes, and decorative assemblies
❓ Frequently Asked Questions (FAQ)
Q: What's the difference between button head and socket head cap screws?
A: Button head screws have a rounded, low-profile dome shape that's more decorative and provides more clearance. Socket head cap screws have a taller cylindrical head that's stronger but protrudes more. Button heads are ideal when appearance and clearance matter; socket heads when maximum strength is needed.
Q: Are these button head screws fully threaded?
A: Yes, these A2 stainless steel button head screws are fully threaded from just below the head to the tip. This allows for maximum thread engagement regardless of material thickness and makes them versatile for various applications where the screw may need to engage along its entire length.
Q: What Allen key sizes do I need for these screws?
A: You'll need multiple hex keys: 2mm (M3), 2.5mm (M4), 3mm (M5), 4mm (M6), 5mm (M8), and 6mm (M10). Using the correct size is crucial to prevent rounding the socket. For button head Allen screws, we recommend high-quality hex tools that fit snugly.
Q: Can these be used outdoors or in marine environments?
A: The A2-70 (304) stainless steel offers excellent corrosion resistance for most outdoor applications. For freshwater environments, patio furniture, and general outdoor use, these stainless steel button head bolts are perfect. For saltwater marine applications, A4 (316) stainless steel is recommended.
Q: How are button head screw lengths measured?
A: Button head screw length is measured from the underside of the head (where it contacts the material) to the tip of the screw. The head height is not included in the length measurement. This is standard for all socket head type screws.
Q: What does ISO7380 standard mean?
A: ISO7380 is an international standard that specifies dimensions, tolerances, mechanical properties, and technical requirements for button head screws with hexagon socket. Screws manufactured to this standard ensure consistent quality, precise dimensions, and reliable performance across different manufacturers.
Q: Are these suitable for high-stress applications?
A: While button head Allen screws offer good strength, their rounded head design has slightly less tensile strength compared to socket head cap screws. They're excellent for most applications but for extremely high-stress or structural applications, socket head cap screws might be more appropriate.
