⚫ Product Overview: M2–M5 Phillips Countersunk Bolts – Black Carbon Steel Machine Screws
Need a fastener that sits flush with the surface and won't stand out on dark equipment or furniture? These M2, M2.5, M3, and M5 Phillips countersunk (flat head) machine screws feature a black finish – perfect for automotive trim, electronics enclosures, and industrial panels where a stealthy, professional look matters. Made from carbon steel with a corrosion‑resistant black coating, they're strong and reliable for indoor use. The 90° flat head sinks neatly into countersunk holes, leaving a smooth, snag‑free finish. The Phillips drive works with standard #0 to #2 bits. Fully threaded with standard coarse metric pitch, these bolts are ideal for sheet metal, plastic assemblies, furniture, and DIY repairs. Available in various lengths (measured under the head).
✨ Why These Black Countersunk Phillips Screws Are a Workshop Favorite
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Black coated carbon steel – Strong and durable with a dark, non‑reflective finish. Great for black anodized parts, powder‑coated panels, and stealth builds.
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Phillips countersunk (flat) head – Sits flush with the surface after countersinking. Leaves a smooth, professional finish – no snagging.
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Metric sizes M2, M2.5, M3, M5 – Covers small electronics (M2/M2.5) up to medium furniture (M5). Note: M4 not included, but M5 handles larger needs.
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Fully threaded, coarse metric pitch – Standard pitches: M2x0.4, M2.5x0.45, M3x0.5, M5x0.8. Threads run the entire length for maximum grip.
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Length measured under the head – No confusion: an M3 x 12mm screw has 12mm of threaded shank below the flat head.
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Versatile application – Ideal for sheet metal, machinery guards, furniture, electronics, automotive trim, and general DIY fastening.
📏 Technical Specifications – Black Countersunk Phillips Screws (M2–M5)
| Specification |
M2 |
M2.5 |
M3 |
M5 |
| Thread Diameter (d) |
2mm |
2.5mm |
3mm |
5mm |
| Thread Pitch (p) |
0.4mm |
0.45mm |
0.5mm |
0.8mm |
| Head Style |
Flat / Countersunk (82°–90° typical) |
| Drive Style |
Phillips cross‑head (PH0 for M2/M2.5, PH1 for M3, PH2 for M5) |
| Material |
Carbon steel with black coating |
| Thread Type |
Fully threaded |
| Length Range (under head) |
Various – select from product options (typical: 3–30mm depending on size) |
| Finish |
Black (oxide or similar dark coating) |
| System of Measurement |
Metric |
❓ FAQs – Black Countersunk Phillips Screws (M2–M5)
🔸 Are these screws fully threaded? How is length measured?
Yes – they are fully threaded from just under the head to the tip. Length is measured as total screw length including the head (standard for countersunk screws). For example, an M3 x 12mm screw is 12mm long overall from the top of the flat head to the tip.
🔸 Will the black coating rust or wear off?
The black coating provides moderate corrosion resistance for indoor use. For outdoor or high‑moisture applications, stainless steel is recommended. With repeated driving, the recess and threads may show some wear, but the coating holds up well for typical indoor furniture, electronics, and machinery use.
🔸 What Phillips screwdriver size do I need for each diameter?
M2 and M2.5: use PH0 or PH00. M3: use PH1. M5: use PH2. Using the correct size prevents stripping.
🔸 Can I use these screws with nuts, or are they self‑tapping?
These are standard machine screws – they require a matching metric nut (M2, M2.5, M3, or M5) or a pre‑tapped hole. They are not self‑tapping. For sheet metal applications, they work best with nuts or threaded inserts.
🔸 Why does the product name include M5 but not M4? Can I get M4?
This set includes M2, M2.5, M3, and M5. M4 is not currently offered in this line, but M5 is close in size and often interchangeable for larger fastening needs. Contact us if you specifically require M4 – we may have other listings.
🔸 Are these screws magnetic?
Yes – carbon steel is magnetic. For most indoor applications, that's not an issue. If you need non‑magnetic fasteners for sensitive electronics, consider brass or stainless steel.
