M1.4–M5 Round Head Phillips Machine Screws, Nickel Plated Metric Bolts

A general rule is to select a length that allows the screw to engage at least 1.5× its diameter into the receiving material. For example, an M3 screw should typically thread at least 4.5mm into the base. For through-hole applications, measure the total material thickness and add clearance for the round head. Lengths in this listing range from 3mm (≈1/8") to 30mm (≈1-3/16"). When in doubt, size up — a slightly longer screw is easier to trim or accommodate than one that's too short.

These are generally standard-grade steel machine screws suited for light-to-medium clamping loads in electronics, small appliances, and general assembly. Exact tensile and shear values depend on the specific diameter and the material grade of the steel used. For structural or safety-critical applications, please contact us to confirm specifications before ordering.

The nickel plating provides moderate oxidation resistance, making these screws well-suited for indoor use and light-humidity conditions. They are generally not recommended for prolonged outdoor exposure, marine environments, or applications involving direct water contact. For those conditions, stainless steel fasteners are typically a better choice. Contact us if you need guidance on material selection.

These screws follow the ISO metric coarse thread standard — the most widely used metric thread system worldwide. Common pitches are M2 × 0.4mm, M2.5 × 0.45mm, M3 × 0.5mm, M4 × 0.7mm, and M5 × 0.8mm. They are compatible with standard metric hex nuts, nylon-insert lock nuts, brass threaded inserts, and tapped holes of the same designation. Always verify the thread designation (diameter × pitch) matches your mating hardware.

Driver bit sizing generally follows this guide: M1.4–M2 typically use a PH0 bit; M2.5–M3 typically use a PH1 bit; M4–M5 typically use a PH2 bit. Always use a correctly sized bit — an oversized or undersized bit can cam out and damage the Phillips recess, especially on smaller diameters like M1.4 and M2.

The 5- or 10-piece packs are ideal for one-off repairs, prototyping, or when you only need a specific size in small quantities. The 30- or 80-piece packs offer a lower per-unit cost and are well-suited for production runs, workshop stock, or ongoing maintenance where you regularly use the same size. If you're unsure how many you'll need, starting with a 10-pack is a practical middle ground.

Yes — the small diameter range (M1.4–M5) and round head profile make these screws well-suited for electronics enclosures, PCB standoff mounting, thin aluminum panels, and plastic housings. The round head does not require a countersink and distributes clamping force evenly across the surface, reducing the risk of cracking thin or brittle materials. For very thin plastics, consider using a washer to further spread the load.