M1.2–M4 Phillips Pan Head Machine Screws A2 Stainless Steel DIN 7985

A general rule is to choose a length that allows the screw to penetrate the base material by at least 1.5× the screw diameter. For example, an M3 screw (3mm / ≈0.12" diameter) typically needs at least 4–5mm of thread engagement. If you're fastening two panels together, add both thicknesses and select the next available length up. When in doubt, go slightly longer — you can always use a washer or nut to adjust. Length is measured from under the head to the tip for pan head screws.

These screws are made from A2 stainless steel (304 grade), which typically has a tensile strength of around 500–700 MPa. A2 stainless is non-magnetic, corrosion-resistant in most environments, and does not require additional surface coating. For structural or high-load applications, consult an engineer to verify thread engagement and safety margins meet your requirements.

A2 stainless steel generally performs well in typical outdoor conditions, including rain and humidity. However, for prolonged exposure to saltwater, chlorinated pools, or aggressive industrial chemicals, A4 (316) stainless steel is generally recommended. For most DIY outdoor projects — garden furniture, enclosures, light fixtures — these screws will typically hold up well over time.

These screws conform to DIN 7985 / ISO 7045, using standard ISO metric coarse thread. They are compatible with standard metric nuts, threaded inserts, and tapped holes following the ISO metric thread standard. Common thread pitches: M2 = 0.4mm, M2.5 = 0.45mm, M3 = 0.5mm, M4 = 0.7mm. Always verify thread pitch matches your nut or insert before assembly.

Driver bit size varies by screw diameter. As a general guide: M1.2–M1.6 typically use a PH0 bit, M1.7–M2.5 typically use PH1, and M3–M4 typically use PH2. Always test the fit before applying torque — a correctly sized bit should seat fully in the recess without wobble. Using the wrong size can cause cam-out and damage the screw head.

Yes. The smaller sizes (M1.2–M2) are commonly used in electronics enclosures, PCB standoffs, small device assembly, and RC model builds. A2 stainless steel is non-magnetic and does not interfere with most electronic components. The pan head profile provides a wide, low-profile bearing surface that won't damage thin panels or circuit boards.

For a single repair or small project, a pack of 10 or 50 is usually sufficient. If you're building multiple units, stocking a workshop, or running a production run, 100–1,000 packs offer better per-unit value. Larger quantities are also useful as spares — small metric screws are easy to lose and having extras on hand saves time on future projects.