八.PT英制錐度螺紋九NPT美制錐度螺紋規格規格PT1/8－28NPT1/8－27PT1/4－19NPT1/4－18PT3/8－19NPT3/8－18PT1/2－14NPT1/2－14PT3/4－14NPT3/4－14PT1－11NPT1－111/2PT11/4－11NPT11/4－111/2PT11/2－11NPT11/2－111/2PT2－11NPT2－111/2PT21/2－11NPT21/2－8PT3－11NPT3－8PT31/2－11NPT4－8PT4－11 INCH(英制)METRIC(公制)15/8-8UN5/16-18UNCM2.0X.4013/4-8UN5/16-24UNFM2.2X.4517/8-8UN3/8-16UNCM2.5X.452-8UN3/8-24UNFM3.0X.5021/8-8UN7/16-14UNCM3.5X.6021/4-8UN7/16-20UNFM4.0X.7023/8-8UN1/2-13UNCM4.5X.7521/2-8UN1/2-20UNFM5.0X.8025/8-8UN9/16-12UNCM6.0X1.0023/4-8UN9/16-18UNFM7.0X1.0027/8-8UN5/8-11UNCM8.0X1.253-8UN5/8-18UNFM10.0X1.2531/4-8UN3/4-10UNCM10.0X1.502-56UNC3/4-16UNFM12.0X1.252-64UNF7/8-9UNCM12.0X1.753-48UNC7/8-14UNFM14.0X1.503-56UNF1-8UNCM14.0X2.004-40UNC1-12UNFM16.0X1.504-48UNF11/8-7UNCM16.0X2.005-40UNC11/8-12UNFM18.0X1.505-44UNF11/4-7UNCM18.0X2.506-32UNC11/4-12UNFM20.0X1.506-40UNF13/8-6UNCM20.0X2.508-32UNC13/8-12UNFM22.0X1.508-36UNF11/2-6UNCM22.0X2.5010-24UNC11/2-12UNFM24.0X2.0010-32UNF12-28UNFM24.0X3.0012-24UNC1/4-20UNCM27.0X2.001/4-28UNFM27.0X3.00M30.0X2.00M30.0X3.50