φ20.6mm 2-M10×1
φ22.2mm 2-M12×1
φ20.6mm 2-3/8-24UNC
20.6mm
φ23.8mm 2-M10×1
φ19.0mm 3-M10×1
φ20.64mm 3-M10*1
20.64MM 2-M10*1 2-M12*1
φ22.2mm 3-M10×1
22.22mm 3-M10*1