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You’re working on a laptop, a tablet, or a slim electronic enclosure – and a standard pan head screw would stick out too far. These M4 flat wafer head screws are ultra‑thin, with a wide, low‑profile head that sits almost flush with the surface. The Phillips drive gives you reliable engagement, and the head shape distributes clamping force evenly without the need for countersinking. Made from carbon steel with your choice of nickel or black zinc plating, they resist corrosion and look clean. Available in lengths from 6mm to 16mm (under head). Fully threaded for maximum grip. Ideal for thin metal panels, plastic casings, and any application where head height is critical.
| Thread Diameter | Thread Pitch (mm) | Length (mm, under head) * | Head Style | Drive | Finish Options | Pack Sizes |
|---|---|---|---|---|---|---|
| 📐 Length measured from underside of head to tip. Fully threaded. Select length, finish, and pack size from dropdown. | ||||||
| M4 | 0.7 | 6, 8, 10, 12, 14, 16 | Ultra thin flat wafer head | Phillips | Nickel plated or black zinc plated | 30 / 100 / 200 / 400 |
* Lengths are typical – exact availability may vary. Please allow minor manual measurement errors. Head height is approximately 0.8–1.2mm – significantly lower than standard pan head screws.
| Finish | Appearance | Corrosion Resistance | Best For |
|---|---|---|---|
| Nickel plated | Bright silver, slightly shiny | Good – indoor use, light moisture | Laptops, consumer electronics, visible hardware |
| Black zinc plated | Matte black, low glare | Moderate – indoor use, light moisture | Industrial equipment, dark enclosures, automotive trim |
1. How do I measure the length of a flat wafer head screw?
For flat wafer 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 “M4 x 8mm” screw has an 8mm long threaded shaft under the head.
2. Do I need to countersink the hole for these screws?
No – wafer head screws are designed to sit on top of the surface. Their ultra‑thin profile provides a clean, low‑profile finish without countersinking. Just drill a clearance or pilot hole and drive the screw.
3. Are these screws fully threaded?
Yes – all M4 screws in this range (6–16mm length) are fully threaded from under the head to the tip, giving you maximum grip in shallow holes.
4. Will the nickel or black zinc finish rust? Can I use these outdoors?
Both finishes provide good corrosion resistance for indoor use and occasional light outdoor exposure. For continuous outdoor or marine environments, we recommend stainless steel screws. For most electronics, appliances, and indoor machinery, these are perfectly adequate.
5. What screwdriver do I need for M4 Phillips screws?
Use a #1 or #2 Phillips screwdriver. A #2 is more common for M4. Always use a driver that fits snugly to avoid cam‑out and head damage.
6. Can I use these screws with a nut? What size nut fits?
Yes – these are machine screws. Use a standard M4 metric nut (0.7mm pitch). They will also thread into pre‑tapped M4 holes. For wood or plastic, use a threaded insert or a nut on the back.
