21 3-M10*1.25
φ20.64mm 3-M10*1.25
φ22.22mm 2-M10*1 M12*1
26.99mm 3/8-24.2-M10*1 M12*1
28.5mm 2-M12*1, M14*1.5
φ23.81mm 4-M10*1
φ25.4mm 2-M10*1
φ22.22mm 2-M10*1