This M2.6x5 hexagon socket head cap screw is an RC-scale hardware item supplied by O.S. Engine as model OS79871010, sold in a pack of 10 pcs. It is meant for use in small assemblies where a compact recessed-head fastener is required, for example engine mountings, linkages and small chassis brackets on scale models.
Attention is given to consistent thread size and head profile so replacements do not alter fit or alignment. The M2.6 designation appears in the product title and should be matched to the tapped holes and nuts in your model to ensure correct clamping and clearance.
Check thread engagement and length when selecting a replacement to avoid intrusion into internal parts or insufficient thread depth. The supplied quantity is convenient for routine maintenance and minor rebuild projects.
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