The chain is fine...but I ordered the wrong size. Nine links of the chain I ordered equals six of the size I wanted. My error...
How can I straighten out the springs? I can't use them coil uo as is.
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A solid general‑purpose screw that bites fast and blends in. These Phillips pan head self‑tapping screws are stamped from tough carbon steel and finished in a matte black oxide that resists mild corrosion while keeping a low‑profile look on dark surfaces. The sharp self‑tapping thread cuts its own path into sheet metal, wood, plastic, and composite panels — no pilot hole needed in most thin materials — and the pan head sits flush enough to look neat without being countersunk. Covering six of the most‑called‑for metric diameters — M2, M2.5, M3, M4, M5, and M6 — this range handles precision electronics and small appliances right through to automotive brackets and metalwork. If you need a dependable, no‑frills fastener that just works, these black oxide screws deliver.
| Size | Thread Diameter | Available Lengths (mm)* | Head Style | Drive | Material & Finish |
|---|---|---|---|---|---|
| M2 | 2.0 mm | Various (see listing) | Pan Head | Phillips | Carbon Steel, Black Oxide |
| M2.5 | 2.5 mm | Various (see listing) | Pan Head | Phillips | Carbon Steel, Black Oxide |
| M3 | 3.0 mm | Various (see listing) | Pan Head | Phillips | Carbon Steel, Black Oxide |
| M4 | 4.0 mm | Various (see listing) | Pan Head | Phillips | Carbon Steel, Black Oxide |
| M5 | 5.0 mm | Various (see listing) | Pan Head | Phillips | Carbon Steel, Black Oxide |
| M6 | 6.0 mm | Various (see listing) | Pan Head | Phillips | Carbon Steel, Black Oxide |
* Exact length options vary by diameter. Choose your required size and length from the listing variations. Screws comply with national standard dimensions.
In thin sheet metal (up to about 1 mm), most plastics, and softwoods, you can drive them directly. For thicker steel, very hard plastics, or dense hardwoods, a small pilot hole (about 80% of the thread diameter) reduces driving torque and ensures the cleanest thread.
Black oxide provides a thin, protective surface that resists light moisture and handling corrosion. It won't peel like paint. For long‑term outdoor exposure or constant wet conditions, a supplementary oil film or stainless steel fastener is recommended, but indoors, they hold up very well.
Yes. Carbon steel is strongly magnetic. This can help retrieve dropped screws with a magnetic pickup tool, but it may not be suitable for extremely sensitive electronics where magnetism must be avoided.
Absolutely. The self‑tapping thread performs well in both materials. These screws are a popular choice for wood‑to‑metal connections, such as fastening metal brackets to timber studs or assembling mixed‑material furniture.