A2 Stainless Steel Phillips Flat Head Machine Screws — Flush Fit for Clean, Professional Results
Whether you're assembling electronics, building furniture, or tackling a home improvement project, finding the right countersunk screw in the exact size you need shouldn't be a hassle. Mismatched threads, protruding heads, and rust-prone hardware are frustrating setbacks — especially mid-project. These A2 stainless steel Phillips flat head machine screws are stocked in a wide range of metric sizes so you can grab exactly what you need, in the quantity that makes sense.
Each screw is machined from A2 (Grade 304) stainless steel with a countersunk flat head and Phillips drive. Sizes span M2 through M6, with lengths from 3mm (≈1/8") to 50mm (≈2"), and pack options of 1, 5, 20, or 50 pieces. The tapered underside allows the head to sit flush with the surface when driven into a properly countersunk hole, delivering a clean, snag-free finish.
These screws are a go-to for electronics enclosure assembly, where M2 and M2.5 countersunk screws keep PCB mounts tidy and low-profile. They're equally at home in cabinetry and flat-pack furniture builds, where M4 and M5 flat head bolts provide solid pull-through resistance without standing proud of the surface. Hobbyists and makers also rely on M3 Phillips countersunk screws for 3D printer frames, RC chassis, and robotics builds.
🔩 Compatibility: Metric coarse thread (DIN 965 / ISO 7046). Fits standard metric nuts, threaded inserts, and tapped holes in M2, M2.5, M3, M4, M5, and M6. Select your size and pack quantity from the variant options above.
✅ Key Features of These A2 Stainless Steel Phillips Countersunk Machine Screws
-
🦀A2 (304) Stainless Steel Construction — Resists rust and corrosion in humid, indoor, and light outdoor environments without surface coatings that can chip or flake over time.
-
⬇️Countersunk Flat Head Profile — The 90° tapered underside seats flush with the workpiece surface, eliminating protruding heads that snag clothing, wiring, or adjacent components.
-
🔧Phillips Drive Compatibility — Works with standard PH0, PH1, and PH2 screwdriver bits and power drivers; no specialty tools required for installation.
-
📏Wide Size Range — M2 to M6, 3mm to 50mm — One listing covers the most common metric machine screw sizes, so you can order the exact diameter and length without buying a mixed assortment you'll never fully use.
-
📦Flexible Pack Quantities — Choose packs of 1, 5, 20, or 50 to match your project scale — from a single replacement fastener to a bulk supply for production or workshop stock.
-
🏭DIN 965 / ISO 7046 Standard — Manufactured to metric coarse thread standards, ensuring consistent thread pitch and dimensional accuracy for reliable engagement with nuts and threaded inserts.
📐 Technical Specifications — Phillips Flat Head Machine Screws
| Material |
A2 Stainless Steel (Grade 304) |
| Head Style |
Countersunk / Flat Head (90° taper) |
| Drive Type |
Phillips (PH) |
| Thread Type |
Metric Coarse |
| Standard |
DIN 965 / ISO 7046 |
| Available Diameters |
M2, M2.5, M3, M4, M5, M6 |
| Available Lengths |
3mm (≈1/8") to 50mm (≈2") — see variant options |
| Pack Sizes |
1, 5, 20, 50 pieces |
| Finish |
Bright (natural stainless, uncoated) |
| Tensile Strength |
Typically 500–700 MPa (A2-70 grade) |
| Recommended Driver Bit |
PH0 (M2–M2.5) / PH1 (M3–M4) / PH2 (M5–M6) |
| Country of Origin |
See variant options |
| Ships From |
US Warehouse |
⚠️ Before ordering: Verify the thread diameter, length, and countersink angle required for your application. If you're unsure which size fits your project, feel free to contact us to confirm.
❓ Frequently Asked Questions
How do I choose the right screw length?
A general rule of thumb is to select a length that allows at least 2–3 times the screw diameter to engage the receiving material. For example, an M3 screw typically needs at least 6–9mm of thread engagement. If you're fastening two panels together, add the thickness of the top panel to the required thread engagement depth. Our range covers 3mm (≈1/8") to 50mm (≈2") so you can find the right fit for most applications.
What grade of stainless steel are these screws?
These screws are made from A2 stainless steel, also known as Grade 304. A2 offers good corrosion resistance for most indoor and light outdoor environments. It is non-magnetic in its annealed state and generally suitable for applications where mild moisture exposure is expected.
Can I use these screws outdoors or in marine environments?
A2 stainless steel performs well in most outdoor settings and resists rust from rain and humidity. However, for prolonged saltwater or coastal marine exposure, A4 (Grade 316) stainless steel is generally recommended for superior chloride resistance. For typical outdoor DIY and garden use, A2 is typically sufficient.
What thread standard do these screws use — are they compatible with standard metric nuts?
Yes. These are metric coarse thread machine screws conforming to DIN 965 / ISO 7046. They are compatible with standard metric nuts, threaded inserts, and tapped holes in the corresponding size (M2, M2.5, M3, M4, M5, or M6). They are not compatible with UNC/UNF (imperial) threads.
What screwdriver or bit size do I need?
These screws use a Phillips (PH) drive. For smaller sizes like M2 and M2.5, a PH0 bit is typically used. M3 and M4 generally take a PH1 bit, while M5 and M6 typically use a PH2 bit. Always use a well-fitting bit to avoid cam-out and head damage, especially on smaller screws.
What does "countersunk" or "flat head" mean, and do I need to pre-drill?
A countersunk (flat head) screw has a tapered underside that allows it to sit flush with or below the surface of the material when driven into a countersunk hole. This gives a clean, snag-free finish — ideal for panels, electronics enclosures, and furniture. For metal and hard plastics, you will generally need to pre-drill a clearance hole and use a countersink bit to create the matching taper before driving the screw.
How much load or torque can these screws handle?
The load capacity depends on the screw diameter, length, material being fastened, and installation method. A2 stainless steel machine screws generally have a tensile strength of around 500–700 MPa (A2-70 designation). For structural or safety-critical applications, consult an engineer and verify recommended torque specifications for your specific size and application.
Can I use these in electronics or PCB assembly?
Yes. M2 and M2.5 Phillips countersunk machine screws are commonly used in electronics enclosures, PCB standoff mounting, and small device assembly. A2 stainless steel is non-magnetic in most conditions and does not introduce significant interference in typical low-frequency electronics applications. For high-sensitivity RF or magnetic environments, verify material compatibility with your design requirements.
🛒 Select your size and pack quantity above, then add to cart — ships from our US warehouse.
