OTG D-Lok Union
union_du_diagramOTG D-Lok Instrumentation Tube Fitting

Union DU

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OTG D-Lok Instrumentation Tube Fitting achieve leak-tight performance with a robust tube grip and vibration resistance. Origin Korea made quality products.

OTG D-Lok tube fitting union listed in this catalog are ordered by part number. The D-Lok part numbering system consists of representing size and style of the fitting and materials used.

The part number describes fitting that are completely assembled.; with reference to the tubing outside diameter (O.D.) first, then followed by the pipe size in the largest end is indicated first.

Every OTG D-Lok products complete with Heat Code Traceability.

We supply South East Asia – Malaysia . Indonesia . Vietnam . Philippines

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Product Description

OTG D-Lok  UNION

Part No. Tube O.D D1 Min Width across flat L2 L1 l L
h H
in mm in mm in mm
DU 2 1/8 3.17 2.28 7/16 11.11 7/16 11.11 12.70 15.24 22.35 35.56
DU 3 3/16 4.76 3.04 7/16 11.11 1/2 12.70 13.71 16.00 24.13 37.33
DU 4 1/4 6.35 4.82 1/2 12.7 9/16 14.28 15.24 17.78 26.16 40.89
DU 5 5/16 7.93 6.35 9/16 14.28 5/8 15.87 16.25 18.54 28.19 42.92
DU 6 3/8 9.52 7.11 5/8 15.87 11/16 17.46 16.76 19.30 30.22 44.95
DU 8 1/2 12.70 10.41 13/16 20.63 7/8 22.22 22.86 21.84 30.98 51.30
DU 10 5/8 15.87 12.70 15/16 23.81 1 25.40 24.38 21.84 31.75 52.07
DU 12 3/4 19.05 15.74 1-1/16 26.98 1-1/8 28.57 24.38 21.84 33.27 53.39
DU 14 7/8 22.22 18.28 1-3/16 30.16 1-1/4 31.75 25.90 21.84 35.05 55.37
DU 16 1 25.40 22.35 1-3/8 34.92 1-1/2 38.10 31.24 26.41 40.38 64.77

OTG D-Lok Instrumentation Tube Fitting 

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Malaysia Indonesia Vietnam Philippines