公稱通徑 ｜外徑 ｜中心至端面 ｜ Nminal Diameter｜Outside Diameter｜Center T end｜ Mm｜In｜D1×D2｜C｜M｜ 20×20｜3/4×3/4｜25×25 26.7×26.7｜29｜29｜ 20×15｜3/4×1/2｜25×20 26.7×21.3｜29｜29｜ 25×25｜1×1｜32×32 33.4×33.4｜38｜38｜ 25×20｜1×3/4｜32×25 33.4×26.7｜38｜38｜ 32×32｜1.1/4×1.1/4｜38×38 42.2×42.2｜48｜48｜ 32×35｜1.1/4×1｜38×32 42.2×33.4｜48｜48｜ 40×40｜1.1/2×1.1/2｜45×45 48.3×48.3｜57｜57｜ 40×25｜1.1/2×1｜45×32 48.3×33.4｜57｜57｜ 50×50｜2×2｜57×57 60.3×60.3｜64｜64｜ 50×25｜2×1｜57×32