This Hirobo HI2538009 kit includes ten M3 x 26 countersink disk screws intended for general fastening on RC-scale helicopters. The countersink head sits flush when fitted, helping to minimise protrusion on shell panels and small structural fittings.
Use these screws wherever an M3 x 26 countersink specification is required; they are suitable for panel joins and light assemblies. When installing, seat the head fully and tighten until firm to avoid stripping threads or deforming thin parts.
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