Thread pitch: 0.4mm (M2) / 0.5mm(M3) / 0.7mm(M4). Thick: 1.8mm (M2) / 2.7mm(M3) / 3mm(M4). M3 L(spacer length) + 6mm(outside thread length). M3 L(spacer length). thread pitch: 0.5mm(M3). Spacer length: 6mm,8mm,10mm,12mm.
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