Kyosho 1-S12605H M2.6x5mm Hex Button Screw 10pcs

A pack of ten M2.6 x 5mm button head screws with a hex socket drive, from Kyosho's universal hardware range.

M2.6 is a small thread used where an M3 would be too large for the material: servo mounts, small linkage brackets, body and electronics fixings, and the smaller-scale chassis. Because the thread is fine, it strips more easily than M3, so these want to be tightened by feel rather than force.

A button head has a low, domed profile rather than the taller cylindrical head of a cap screw. That matters where clearance is tight or where a proud head would catch on something, and the wider bearing surface spreads clamping load better across a plastic part, which reduces the chance of cracking it.

The hex socket drive lets you apply torque without rounding the head, which a cross-head fastener at this small size will do almost immediately.

At 5mm this is a short screw for shallow bosses. Using one too long is a common way to crack a part from behind. This supersedes the older Kyosho number 1369.