ProTek RC 4x4mm "High Strength" Cup Style Set Screws (10)

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This is a pack of ten 4x4mm "High Strength" Cup Style Set Screws from ProTek R/C. These are made from metric grade 12.9 steel which has a minimum tensile strength of 174,000 PSI. T hese screws are the strongest you can get and are suitable for the most demanding applications! Most manufacturer brand screws are not grade 12.9 steel, so these are a great upgrade for your car, truck or helicopter! Show more