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Replacing a stripped or missing M1.0 or M1.2 screw in a watch, eyeglass frame, or precision instrument is one of the most frustrating repair tasks — the wrong size, wrong head type, or wrong material can damage the housing or leave the head proud. These A2 stainless steel Phillips countersunk flat head micro machine screws in M1 through M2.5 to GB/T 819 are the right choice: the 90° countersunk head sits flush with or below the surface, A2 (SUS304) stainless steel provides corrosion resistance and non-magnetic properties, and the full range from M1.0×3mm (0.12”) to M2.5×60mm (2.36”) covers the most common micro fastener sizes in a single listing.
GB/T 819 is dimensionally compatible with ISO 7046 and DIN 965 — these screws are interchangeable with metric countersunk screws to those standards. Pack sizes of 1, 10, 50, and 100 pieces let you order a single replacement or stock a full range for production use. Not all length options are available for every diameter — check the selector for your specific combination.
Typical applications include watch and clock repair (M1.0–M1.4), eyeglass frame fastening (M1.4–M1.6), camera and optical instrument assembly (M1.6–M2), hearing aid and medical device fastening (M1.0–M1.6), electronics enclosure and panel mounting (M2–M2.5), and precision DIY projects requiring a flush stainless countersunk fastener at micro sizes.
| Material | A2 Stainless Steel (SUS304 / 304 / 18-8) |
|---|---|
| Finish | Natural stainless (no coating) |
| Thread Standard | ISO Metric |
| Thread Diameters | M1.0, M1.2, M1.4, M1.6, M2, M2.5 |
| Head Style | Countersunk Flat Head (90° angle) |
| Drive Type | Phillips — PH000 (M1–M1.4) / PH00 (M1.6–M2) / PH0 (M2.5) |
| Standard | GB/T 819 (compatible with ISO 7046 / DIN 965) |
| Available Lengths | 3mm (0.12”), 4mm (0.16”), 5mm (0.20”), 6mm (0.24”), 7mm (0.28”), 8mm (0.31”), 9mm (0.35”), 10mm (0.39”), 12mm (0.47”), 14mm (0.55”), 16mm (0.63”), 18mm (0.71”), 20mm (0.79”), 22mm (0.87”), 25mm (0.98”), 28mm (1.10”), 30mm (1.18”), 32mm (1.26”), 35mm (1.38”), 38mm (1.50”), 40mm (1.57”), 45mm (1.77”), 50mm (1.97”), 60mm (2.36”) |
| Pack Sizes | 1 / 10 / 50 / 100 pcs |
| Length Measurement | Including head (total length per GB/T 819) |
| Screw Type | Machine screw (requires tapped hole or nut) |
| Magnetic | Non-magnetic (austenitic stainless) |
| Corrosion Resistance | Excellent — suitable for indoor and precision instrument use |
| Common Applications | Watches, eyeglasses, cameras, hearing aids, medical devices, electronics enclosures, precision instruments |
For countersunk screws, length is measured including the head (total length per GB/T 819). The screw should sit flush with or just below the surface when fully driven into a properly countersunk hole at 90°. Available lengths: 3mm (0.12”) to 60mm (2.36”) depending on the diameter. When in doubt, size up.
GB/T 819 is the Chinese national standard for countersunk flat head Phillips machine screws with a 90° head angle, dimensionally compatible with ISO 7046 and DIN 965. SUS304 is the Japanese/Asian designation for 304 austenitic stainless steel, equivalent to A2 or 18-8 stainless — the same material, different naming convention. These screws are interchangeable with metric countersunk screws to ISO 7046 or DIN 965.
Yes. M1.0, M1.2, M1.4, and M1.6 are standard micro fastener sizes used in watches, eyeglasses, cameras, hearing aids, and precision instruments. A precision screwdriver (PH000 for M1–M1.4, PH00 for M1.6) and careful torque control are essential — do not overtighten. These are extremely small screws; handle with care.
A Phillips precision screwdriver matched to the screw size: PH000 for M1–M1.4, PH00 for M1.6–M2, PH0 for M2.5. Always use a well-fitting driver to avoid cam-out, especially when driving the head flush into a countersunk hole. A quality precision screwdriver set is strongly recommended.
A2 (SUS304) stainless steel provides strong corrosion resistance and will not rust under normal indoor conditions. It is the standard material for precision instrument fasteners where corrosion resistance and non-magnetic properties are required. For marine or highly corrosive environments, A4 (316) stainless is recommended.
Yes — these are machine screws, not self-tapping. They require a pre-tapped hole or a matching metric nut in the same thread size. They will not cut their own thread into plastic or metal.
Available in packs of 1, 10, 50, and 100 pieces. The single-piece option is ideal for exact replacements in watches or eyeglasses. The 50 and 100-piece packs offer better per-unit value for repair shops and production use. Select your preferred quantity using the Qty option above.
