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The Range£15.29Visit shop Unifix Machine Screws Slotted Pan Head M5 X 12 - Mms505 012Cr3 - Grey
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The Unifix Machine Screws Slotted Pan Head are high-quality fasteners designed for professional contractors and DIY enthusiasts who require reliable, secure connections in metal-to-metal or machine assembly projects. These screws offer exceptional structural integrity and long-term durability thanks to their precision-engineered DIN 85 specifications, though they do require a manual slotted screwdriver for installation, which may be slower than modern power-driven alternatives.
| Colour | Silver |
|---|---|
| Model Part Number | 1261651 |
| Brand | Unifix |
No, these are machine screws designed for use with pre-tapped metal holes or nuts, not for threaded engagement into wood.
DIN 85 is the German standard for pan head machine screws with a slotted drive, ensuring a specific head shape and dimension for engineering consistency.
While the bright zinc plating offers some corrosion resistance, they are best suited for indoor or sheltered environments. For severe weather, stainless steel is recommended.
You need a standard flat-blade (slotted) screwdriver that fits the width of the screw slot snugly.
Yes, as they are manufactured from high-strength steel, they will attract to a magnet.
Check that the screw and the hole have the same thread pitch and diameter. Ensure there is no metal debris inside the thread.
Ensure you are using the correct size flat-head screwdriver. The blade should be wide enough to nearly fill the entire slot.
The protective zinc coating has likely been scratched. Use a small amount of machine oil or a clear coat finish to protect the affected area.
To ensure optimal performance, verify that your mating parts are tapped with the correct corresponding metric thread. When installing, start the screw by hand to prevent cross-threading. If the screw encounters resistance, back it out and ensure the hole is free of debris. For maintenance, keep the screws in a dry environment; although they are zinc-plated, they are not impervious to rust in high-moisture settings. Avoid overtightening with power tools, as the slotted head can be easily deformed if excessive speed or pressure is applied.
