Kyosho 1-S54004 M4x4 set screws are made to deliver a secure hold for everyday RC assembly and repair. Supplied in a 10pcs pack, they give enough spares for routine maintenance, part swaps, and small rebuilds without oversizing the fastener.
The compact M4x4 size works well where a low-profile, reliable screw is needed. These screws are suited to securing small components, trimming play in linkages, and keeping lightweight fittings snug while preserving the model's structure.
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