Most laptop shell and bottom panel screws are M2 or M2.5 in diameter. M2 screws are typically used on ultrabooks and thin-and-light laptops (e.g., Lenovo ThinkPad, Dell XPS). M2.5 screws are common on mid-range laptops and older models. M3 screws generally appear on desktop PC cases and some larger notebook hinges. Length selection depends on panel thickness — 3mm to 5mm (0.12” to 0.20”) covers most shell applications, while 8mm to 12mm (0.31” to 0.47”) is used for hinges or thicker chassis sections. When in doubt, measure the original screw with a caliper before ordering.

The PC Screw kit contains M2 and M2.5 Phillips pan-head screws for laptop shell and bottom panel reassembly — 200 pieces across 10 size compartments. The HDD Screw kit is designed for SSD and motherboard mounting and includes both small machine screws (M2, M2.5) and brass copper standoff pillars (M2.5 and M3) plus three matching screwdrivers. The PC Case Screw kit covers a wider length range (M2×3 through M2×12, M2.5×4 through M2.5×12, M3×4 and M3×5) with 150 pieces across 15 compartments and includes a free magnetic screwdriver.

Yes. These screws are designed for the same clamping loads as OEM laptop fasteners. Nickel-plated and black zinc-plated steel screws are generally sufficient for laptop shell, SSD, and motherboard mounting applications. Stainless steel variants offer additional corrosion resistance. Always torque to hand-tight plus a quarter turn — over-tightening micro screws can strip threads in plastic bosses.

These kits are designed for indoor electronics assembly. Nickel-plated and black zinc-plated screws have moderate corrosion resistance suitable for controlled indoor environments. For applications exposed to moisture or outdoor conditions, the stainless steel variant (PC Screw — Stainless Steel) is the more appropriate choice, as stainless steel generally offers superior rust resistance.

All screws in these kits use the metric thread standard. M2 has a thread pitch of typically 0.4mm, M2.5 typically 0.45mm, and M3 typically 0.5mm. These are the standard thread sizes used in laptop and consumer electronics manufacturing worldwide. They are not compatible with imperial (UNC/UNF) threaded holes.

The HDD Screw kit includes M2.5 and M3 brass copper standoff pillars (M2.5×5+6, M2.5×6+6, M3×5+6, M3×6+6). M2.5 standoffs are commonly used for M.2 SSD mounting on many laptop motherboards. M3 standoffs are typically used for desktop motherboard mounting. Always verify your motherboard’s standoff specification before installation — using the wrong size can damage the board.

Choose nickel plated for a silver appearance that blends with most laptop interiors and offers good corrosion resistance for indoor use. Choose black zinc plated if your laptop has a dark chassis or you prefer a stealthy look — the finish also provides adequate corrosion protection for indoor electronics. Choose stainless steel if you need maximum corrosion resistance or are working in a more demanding environment. All three finishes are functionally equivalent for standard laptop reassembly.