» Dimensions and weights of Steel Tubes in Accordance withis 1239: 1964 Metric Units 
                              
                                      
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                                   | Nominal Bore | Outside Diameters of Black Tube | Thickness | Weight per mtr of Black Tube | Ordinary Socket |  
                                                | Light | Medium & Heavy | Pain Ends |  | 
                                      
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                                        |  | Approximate Outside Diam. | max | Min. | Max. | Min | Light | Medium | Heavy | Light | Medium | Heavy | Approx. Outside Daim. | Min. Length | 
                                      
                                      
                                        | in | mm | mm | mm | mm | mm | mm | mm | mm | mm | kg | kg | kg | mm | mm | 
                                      
                                        | 1/8 | 6 | 10.2 | 10.1 | 9.7 | 10.6 | 9.8 | 1.8 | 2.0 | 2.65 | 0.378 | 0.410 | 0.493 | 15 | 17 | 
                                       
                                        | 1/4 | 8 | 13.5 | 13.6 | 13.2 | 14.0 | 13.2 | 1.8 | 2.35 | 2.9 | 0.52/2 | 0.659 | 0.762 | 19 | 25 | 
									  
                                        | 3/8 | 10 | 17.2 | 17.1 | 16.7 | 17.5 | 16.7 | 1.8 | 2.35 | 2.9 | 0.68/8 | 0.850 | 1.03 | 21.3 | 26 | 
									  
                                        | 1/2 | 15 | 21.3 | 21.4 | 21.0 | 21.8 | 21.0 | 2.0 | 2.65 | 3.25 | 0.96 | 1.21 | 1.44 | 26.9 | 34 | 
									  
                                        | 3/4 | 20 | 26.9 | 26.9 | 26.9 | 26.4 | 27.4 | 26.5 | 2.35 | 2.65 | 3.25 | 1.41 | 1.57 | 1.89 | 33.7 | 
									  
                                        | 1 25 | 33.7 | 33.8 | 33.2 | 34.2 | 34.2 | 33.3 | 2.65 | 3.25 | 4.05 | 2.01 | 2.42 | 2.95 | 42.6 | 43 | 
									  
                                        | 1.1/4 | 32 | 42.4 | 42.5 | 41.9 | 42.9 | 42.0 | 2.65 | 3.25 | 4.05 | 2.57 | 3.11 | 3.81 | 51 | 48 | 
									  
                                        | 1.1/2 | 2 | 48.3 | 48.4 | 47.8 | 48.8 | 42.9 | 2.9 | 3.25 | 4.05 | 3.27 | 3.59 | 4.41 | 57 | 48 | 
									  
                                        | 2 | 50 | 60.3 | 60.2 | 59.6 | 60.8 | 59.7 | 2.9 | 3.26 | 4.5 | 4.14 | 5.07 | 6.17 | 70 | 56 | 
									  
                                        | 2.1/2 | 65 | 76.1 | 76.0 | 75.2 | 76.6 | 75.3 | 3.25 | 3.65 | 4.5 | 5.80 | 6.49 | 7.92 | 88.9 | 65 | 
									  
                                        | 3.80 | 88.9 | 88.7 | 87.9 | 89.5 | 88.0 | 3.25 | 4.05 | 4.50 | 4.50 | 6.81 | 8.43 | 10.10 | 101.6 | 71 | 
									  
                                        | 3.1/2 | 90 | 101.6 | 101.2 | 100.3 | 102.1 | 100.4 | 3.65 | 4.05 | 4.85 | 8.76 | 9.70 | 11.90 | 114.3 | 75 | 
									  
                                        | 4 | 100 | 11.4.3 | 113.9 | 113.0 | 115.0 | 113.1 | 3.65 | 4.5 | 5.4 | 9.90 | 12.10 | 14.50 | 127 | 83 | 
									  
                                        | 5 | 125 | 139.7 | - | - | 140.8 | 138.5 | - | 4.85 | 5.4 | - | 16.60 | 17.90 | 159 | 92 | 
									  
									    | 6 | 150 | 165.1 | - | - | 166.5 | 163.9 | - | 4.85 | 5.4 | - | 19.70 | 21.20 | 177.8 | 92 | 
									  
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Weight, Dimensions & Thickness