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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Stock your workshop with this 340‑piece assortment of black pan head self-tapping screws, and you’ll always have the right fastener at your fingertips. Cut from hardened carbon steel with a sleek black oxide finish, each screw bites into sheet metal, wood, plastic, and composite materials without a pilot hole – just drive and go. The wide Phillips pan head provides a strong, slip‑resistant hold for your driver and sits near‑flush, while the sharp, clean threads pull tight every time. Eight sizes from M3 to M4.8 and lengths from 10 mm to 25 mm cover the most common light‑duty jobs: electronics, furniture, automotive trim, models, and general repairs. Each kit comes in a sturdy, compartmented storage box so you can grab the exact size you need without digging through loose hardware.
| Size | Thread Diameter | Length (mm)* | Head Style | Drive | Material & Finish | Qty |
|---|---|---|---|---|---|---|
| M3 × 10 | 3.0 mm | 10 | Pan Head | Phillips | Carbon Steel, Black Oxide | 60 |
| M3.5 × 12 | 3.5 mm | 12 | Pan Head | Phillips | Carbon Steel, Black Oxide | 60 |
| M3.5 × 16 | 3.5 mm | 16 | Pan Head | Phillips | Carbon Steel, Black Oxide | 50 |
| M3.5 × 25 | 3.5 mm | 25 | Pan Head | Phillips | Carbon Steel, Black Oxide | 30 |
| M4 × 10 | 4.0 mm | 10 | Pan Head | Phillips | Carbon Steel, Black Oxide | 30 |
| M4 × 12 | 4.0 mm | 12 | Pan Head | Phillips | Carbon Steel, Black Oxide | 40 |
| M4 × 16 | 4.0 mm | 16 | Pan Head | Phillips | Carbon Steel, Black Oxide | 30 |
| M4.8 × 12 | 4.8 mm | 12 | Pan Head | Phillips | Carbon Steel, Black Oxide | 40 |
* Lengths are thread length only (excluding head). All screws are supplied in a reusable partitioned storage box.
In most thin sheet metal, soft plastics, and wood up to moderate hardness, yes. The sharp self‑tapping tip will form its own path. For very dense hardwood or thick metal, a small pilot hole (about 80% of the screw diameter) can make driving easier.
The black oxide coating is durable and provides moderate rust resistance for indoor and light outdoor use. It won’t peel like paint. Prolonged exposure to wet environments may cause surface discoloration, but the carbon steel core will remain strong.
Absolutely. The coarse self‑tapping thread bites well into both soft and hardwood. The black finish is also popular in furniture and cabinet making, where dark hardware is preferred.
The included storage box has nine divided compartments. Each size is pre‑sorted into its own section, making it easy to identify and access the exact screw you need without mixing sizes.
Screws M3 and M3.5 usually take a #1 or #2 Phillips bit; M4 and M4.8 will use a #2 bit. A fresh, properly fitting bit will minimize cam‑out and keep the screw head intact.