Aimpoint Micro Screw, 5-Pack. Hex Black-Oxide Alloy Steel Socket Head, M3-0.5 x 5 mm (1mm longer to give additional hold and to help prevent stripping) Tensile Strength: 170,000 psi Hex Drive Size: 2.5 mm These alloy steel screws are stronger than Grade 8 steel screws. Made in USA.
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