This #4-40, pan-head screw is 1/4" long. It is made from steel, is zinc-plated, and comes in packs of 25.
Our Code: MEC-30079
Supplier Link: [Pololu MPN:1960]
These screws fit the Pololu aluminium universal mounting hubs. 4-40 screws are commonplace in North America but can be a bit hard to find in Australia and other places that have moved to the metric system.
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