Knurled Stainless Steel Thumb Screw M2 M3 M4 M5 M6 Flat Head Thumbscrew Bolt

M4: Head dia:8mm Head thk: 6mm. M2: Head dia:5mm Head thk: 5mm. M2.5: Head dia:5mm Head thk: 5mm. M6: Head dia:10mm Head thk: 8mm.

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