This Kyosho 1-S13028H item is an RC-scale button head screw specified as M3x28 with a hex drive, supplied as a pack of 5 pcs for use on the KC10 chassis. It is presented as a direct spare part for chassis fastening tasks where a short, low-profile head and a threaded M3 shaft are required.
Installation and handling are straightforward: use the correct hex driver to seat the screw, avoid over-torquing to protect plastic or aluminum mounting points, and check fit against the original fastener length before final assembly. As a tuning and maintenance component it secures chassis parts and small brackets and can be kept as routine spare stock for track or field service.
Do not use this description to imply any fitment beyond the stated KC10 chassis category, and do not substitute specialized fasteners where thread type or material grade is critical.
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