50–200pcs Black Carbon Steel Phillips Flat Countersunk Screws (M1–M4, GB819)

Build cleaner, stronger projects with screws that disappear into the surface and stay locked in place. These top‑rated GB819 black carbon steel countersunk screws are a customer favorite for electronics, DIY builds, furniture repair and precision metalwork. Just choose your size, tighten once, and enjoy a flush, professional finish that looks as good as it performs.

⭐ Key Benefits & Features

Strong black carbon steel: Made from high‑quality carbon steel for excellent strength and durability, helping your assemblies stay tight and secure over time.
Flush, professional finish: Flat countersunk head sits level with the surface, giving your projects a smooth, snag‑free feel and a clean, modern look.
Easy Phillips drive: Cross recessed Phillips head grips your screwdriver firmly, reducing cam‑out and making installation quick and user‑friendly, even for beginners.
Versatile sizes (M1–M4): Ideal for electronics, 3D printer builds, RC models, small appliances, furniture hardware, and general home or workshop repairs.
Black oxide finish: Sleek matte black coating looks great, reduces glare, and offers extra resistance to wear and corrosion in everyday use.
Bulk packs for better value: 50, 100 or 200 pieces per bag (depending on size) so you always have the right screw on hand when inspiration strikes.
Top‑rated & customer‑approved: A proven favorite among makers and DIYers who want reliable fasteners that feel solid in the hand and tighten with a crisp, secure turn.

🔧 Where These Screws Shine

Imagine assembling a compact electronics project: the black screws blend into the housing, the heads sit perfectly flush, and every turn of the screwdriver feels smooth and precise. No wobble, no stripped heads, just a solid “click” as each screw pulls the parts together.

Electronics and PCB mounting
3D printer and CNC builds
RC cars, drones, and hobby models
Furniture repair and hardware upgrades
General home, office, and workshop projects

📏 Specifications

Material	Carbon steel
Surface finish	Black oxide
Head type	Flat countersunk head
Drive type	Cross recessed Phillips
Standard	GB819
Available diameters	M1, M1.2, M1.4, M1.6, M2, M2.5, M3, M4
Pack quantity (M2)	100 pcs/bag
Pack quantity (M2.5)	100 pcs/bag
Pack quantity (M3)	100 pcs/bag
Pack quantity (M4)	50 pcs/bag

Note: If you need more sizes or variations, you can explore additional options in our store.

💬 Customer Reviews

★★★★★ – “Perfect for my 3D printer build”
“The black finish looks great and the heads sit perfectly flush. No stripped screws, even with a power driver. I’ll be ordering more sizes for future projects.”

★★★★★ – “Great value and quality”
“You can feel the quality when you tighten them. The Phillips slots are precise and don’t slip. Exactly what I needed for small electronics repairs.”