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NPT螺紋簡(jiǎn)要尺寸 管子公稱尺寸
in 1/16 1/8 1/4 3/8 1/2 3/4 1 1 ¼ 1 ½ 2 2 ½ 3 3 ½ 4
管子外徑 in 0.3125 0.405 0.540 0.675 0.840 1.050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.500
mm 7.9 10.3 13.7 17.1 21.3 26.7 33.4 42.2 48.3 60.3 73.0 88.9 101.6 114.3
每英寸牙數(shù) 27 18 14 11 ½ 8
螺距:mm 0.9408 1.411 1.814 2.209 3.175
旋合長(zhǎng)度:mm 4.064 4.102 5.786 6.096 8.128 8.611 10.160 10.668 11.074 17.323 19.456 20.853 21.438
旋合中徑:mm 7.142 9.489 12.487 15.926 19.772 25.117 31.462 40.218 46.287 58.325 70.159 86.068 98.776 111.433