電線用鋼管 ANSI C80.1

ANSI C80.1 RIGID STEEL CONDIT

稱呼尺寸	外徑	每寸牙數	有效螺紋長度	總體螺紋長度
½	0.840 inch / 21.3 mm	14	13.46 mm	19.81 mm
¾	1.050 inch / 26.7 mm	14	13.97 mm	20.07 mm
1	1.315 inch / 33.4 mm	11½	17.27 mm	24.89 mm
1¼	1.660 inch / 42.2 mm	11⅛	18.03 mm	25.65 mm
1½	1.900 inch / 48.3 mm	11½	18.29 mm	26.16 mm
2	2.375 inch /60.3 mm	11½	19.30 mm	26.92 mm
2½	2.875 inch / 73.0 mm	8	28.96 mm	39.88 mm
3	3.500 inch / 88.9 mm	8	30.48 mm	41.40 mm
3½	4.000 inch /101.6 mm	8	31.75 mm	42.67 mm
4	4.500 inch / 114.3 mm	8	33.02 mm	43.94 mm
5	5.563 inch / 141.3 mm	8	35.81 mm	46.74 mm
6	6.625 inch / 168.3 mm	8	38.35 mm	49.53 mm

厚度可差：＋不限，-12.5%