Type

Model

OD

mm

Width of Wrench Square

 mm

Length of Wrench   mm

Rounding chamfer      θ

T Grade Coupling

5/8

Φ38.1+0.13

          -0.25

34.9 0 

        -0.8

31.8+0.62  

 0

45°

3/4

Φ41.3+0.13

          -0.25

38.1 0 

        -0.8

31.8+0.62  

 0

7/8

Φ46.0+0.13

         -0.25

41.3 0 

        -0.8

31.8+0.62  

  0

1

Φ55.6+0.13

         -0.25

47.6 0 

        -0.8

38.1+0.62  

 0

Grade

Material

Yield Point

MPa

Tensile strength

MPa

Extension Radio

%

Reduction of cross-section

%

Izod Impact toughness

J

D

High Quality Alloy Steel

≥620

793~965

≥10

≥50

≥60.8