M1.6 M2 M3 M4 Button Head Machine Screws – Phillips & Hex Socket Combo Drive, Stainless Steel
M1.6 M2 M3 M4 Button Head Machine Screws – Phillips & Hex Socket Combo Drive, Stainless Steel
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M1.6 M2 M3 M4 Button Head Machine Screws – Phillips & Hex Socket Combo Drive, Stainless SteelM1.6 M2 M3 M4 Button Head Machine Screws – Phillips & Hex Socket Combo Drive, Stainless Steel

M1.6 M2 M3 M4 Button Head Machine Screws – Phillips & Hex Socket Combo Drive, Stainless Steel

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Price:
$23.65 USD
Stock:
In stock (500 units), ready to be shipped

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Description

🔩 M1.6 M2 M3 M4 Button Head Machine Screws – Phillips & Hex Socket Drive (TA Stainless Steel)

You’re building a small drone, mounting a panel on a 3D printer, or assembling delicate electronics – and you want a low‑profile head that looks clean, plus a choice of drives. These M1.6 to M4 button head screws give you both: a Phillips cross recess on one side and a hex socket (Allen) on the other (often called “TA” or combo drive). The rounded button head sits close to the surface, reducing snag risk. Made from high‑grade stainless steel, they resist corrosion in indoor and light outdoor use. Fully threaded, with length measured under the head. Perfect for machine tools, accessories, and precision assemblies where a compact, dual‑drive fastener is handy.

✨ Key Features – Button Head Combo Drive Screws (Phillips + Hex)

  • 🔘 Low profile button head – Rounded top, wide bearing surface. Sits close to the material – ideal for tight spaces.
  • 📏
    Combo drive – Phillips + Hex socket – Use a standard Phillips screwdriver or an Allen key. Works with both, giving you flexibility.
  • 🛡️ Stainless steel (pure alloy) – Corrosion resistant, durable, and strong. Suitable for machine tools and accessories.
  • 📏 Metric sizes M1.6, M2, M3, M4 – Perfect for micro‑electronics, 3D printers, RC models, and precision instruments.
  • 📐 Lengths measured under head (excluding head) – Example: M3 x 8mm means thread diameter 3mm, length from under head to tip is 8mm. Fully threaded.
  • ⚙️ GB standard, high quality – Precision threads, smooth finish. Meets industry tolerances.
  • 🔧 Widely used – Machine tool assembly, electronic devices, 3D printers, small appliances, and hobby projects.

📏 Available Sizes – M1.6 to M4 Button Head Combo Screws

Thread Diameter (M) Thread Pitch (mm) Typical Lengths (mm, under head) * Head Style Drive Material
📐 Length measured from underside of head to tip. Fully threaded. Select exact size from dropdown. 
M1.6 0.35 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 30
(exact availability varies by diameter)		 Button head (low profile) Combo: Phillips / Hex socket Stainless steel (pure alloy)
M2 0.4
M3 0.5
M4 0.7

* Lengths are typical – exact availability may vary. Please allow minor dimensional tolerances within industry standards. Hex key sizes approx: M1.6→1.3mm, M2→1.5mm, M3→2mm, M4→2.5mm.

📋 Why Combo Drive (Phillips + Hex Socket)?

Drive Type Advantage Best Use
Phillips cross Works with common screwdrivers, easy to align, good for quick hand assembly. General assembly, prototypes, quick adjustments.
Hex socket (Allen) Allows higher torque, no cam‑out, recessed drive stays clean. Precision torque control, power tools, tight spaces.
Combination One screw works with either tool – no need to switch bits or search for a specific driver. Field repairs, multi‑user environments, DIY.

❓ Frequently Asked Questions – Button Head Combo Screws

1. How do I measure the length of a button head screw?

For button head screws, length is measured from the underside of the head (the flat bearing surface) to the tip. The head itself is NOT included. So an “M3 x 8mm” screw has an 8mm long threaded shaft under the head. This matches our listing.

2. Are these screws fully threaded?

Yes – all M1.6 to M4 screws in this range are fully threaded from under the head to the tip, giving you maximum grip in blind holes or when using nuts.

3. Can I use both a Phillips screwdriver and a hex key on the same screw?

Yes – the combo drive allows either tool. Use a Phillips for quick hand driving, or a hex key for higher torque. Note: The hex socket is internal, so the Phillips cross is on the surface – they share the same recess.

4. Will these screws rust? Can I use them outdoors?

These are made from stainless steel (pure alloy, likely 304 equivalent), which provides good corrosion resistance for indoor and light outdoor use. For continuous saltwater or harsh chemical environments, consider higher grade (316), but for general DIY, electronics, and machine tools, they are perfectly fine.

5. What hex key size do I need for each screw?

Approximate: M1.6 uses 1.3mm, M2 uses 1.5mm, M3 uses 2mm, M4 uses 2.5mm Allen key. Always use a quality key that fits snugly.

6. Can I use these screws with a nut? What size nut fits?

Yes – these are machine screws. Use standard metric nuts of the same thread size (M1.6, M2, M3, or M4). They will also thread into pre‑tapped holes. They are not self‑tapping; for wood or plastic, use a threaded insert or a nut on the back.

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