Stainless Steel Tube Stainless Steel Tube Products Size Specification Outer diameter Thickness in 0.0197 0.0236 0.0276 0.0315 0.0354 0.0393 0.0475 0.0490 0.0590 0.0630 0.0650 0.0787 0.0830 0.0980 0.1180 0.1200 in mm mm 0.5 0.6 0.7 0.8 0.9 1.0 1.2 1.25 1.5 1.6 1.65 2.0 2.11 2.5 3.0 3.05 3/8" (0.375") 9.50 1/2" (0.500") 12.70 5/8" (0.625") 15.90 3/4" (0.750") 19.00 7/8" (0.875") 22.20 1" (1.000") 25.40 1 1/8" (1.125") 28.60 1 1/4" (1.250") 31.80 1 3/8" (1.375") 35.00 1 1/2" (1.5000") 38.10 1 5/8" (1.625") 41.30 (1.660") 42.16 1 6/8" (1.750") 44.50 (1.900") 48.26 2" (2.000") 50.80 2 1/4" (2.250") 57.15 2 3/8" (2.375") 60.33 2 1/2" (2.500") 63.50 3" (3.000") 76.20 3 1/2" (3.500") 88.90 4" (4.000") 101.60 4 1/2" (4.500") 114.30 5" (5.000") 127.00 6" (6.000") 152.40 ASTM A554 , 3446 , CNS G3119