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Conduit Sizes

ALL SIZES Sadly
ARE in INCHES
ID OD KNOCKOUT
SIZE
TRADE
SIZE
THREADS
/INCH
NOMINAL NOMINAL MAXIMUM NOMINAL
1/4 18 0.364 0.540 N/A 0.575
3/8 18 0.493 0.675 N/A 0.718
1/2 14 0.634 0.840 0.855 0.875
3/4 14 0.836 1.050 1.066 1.109
1 11-1/2 1.063 1.315 1.331 1.375
1-1/4 11-1/2 1.394 1.660 1.676 1.734
1-1/2 11-1/2 1.624 1.900 1.916 1.984
2 11-1/2 2.083 2.375 2.399 2.469
2-1/2 8 2.489 2.875 2.904 2.969
3 8 3.090 3.500 3.535 3.594
3-1/2 8 3.569 4.000 4.040 4.123
4 8 4.050 4.500 4.545 4.641
4-1/2 8 4.506 5.000 5.050 5.109
5 8 5.073 5.563 5.619 5.719
6 8 6.093 6.625 6.691 6.813




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