10/50pcs M2 M2.5 M3 M4 Black Grade 8.8 Carbon Steel GB2673 Six-Lobe Torx Head Flat Countersunk Screw Six Lobe Bolt Metric Thread

Description:

Material: Grade 8.8 Carbon Steel

Thread diameter：2mm(M2) / 2.5mm(M2.5) / 3mm(M3) / 4mm(M4)

Thread pitch: 0.4mm(M2) / 0.45mm(M2.5) / 0.5mm(M3) / 0.7mm(M4)

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