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Thread Diameter: 3 mm Head Diameter: 5.5 mm/0.21inch Head Height: 3 mm/0.12inch Screw Length: 8 mm/0.31inch Allen Hex Drive: 2 mm (H2) Grade：12.9 Surface treatment: black oxidation High Quality Material Alloy Steel Package Included 100 x Socket Head Cap Bolts/Screws Buy with confidence. Money back or exchange guarranteed.
Package Included: 100 x socket head screws.
Metric M3 screws,Thread Diameter: 3mm; Thread Length: 8 mm/0.31inch; Pitch Size: 0.5mm.
Socket cap screws are commonly used in machine parts, die fixturing, and clamping. The socket head enables driving where there is not sufficient space for wrenches or sockets.
The socket head cap screws are 12.9 Grade Alloy Steel which is becoming hardness and more stronger after heat treatment and with good feature of anti-oxidation, high temperature resistance, anti-corrosion.
Socket cap screws are high-hardness that is widely used in home, industrial, laptops,3D printer and 3D printed projects.
