2 X M2.5 Slotted Drive Pan Head Bolts 4mm Length



You may want to put the radio in some kind of box when complete.  You can use these bolts to secure the variable capacitor to a thin panel.  Four washers are also provided which might be needed to pack out a very thin panel to avoid the bolts going in too far and damaging the vanes of the variable capacitor. 

Pan head refers to the cylindrical but rounded shape of the screw head.  It's mildly interesting to note that the 4mm length refers only to the length of the threaded part.  The whole screw including the head measures 5.3mm.  You might call them bolts.  Mechanical engineers will usually refer to them more correctly as machine screws.  M2.5 refers to the metric diameter of the threaded part, that being approximately 2.5mm depending on exactly how you measure or define it.  The historic and ISO (International Standards Organisation) definitions of screw types and thread sizes can get highly complex in the detail if you really want to go into it.

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