Steel Duct Adapters

Duct Adapter

Part

Diameter

Duct Size

OD

ID

Number

(in)

(mm)

(in)

(mm)

Style

(in)

(mm)

(in)

(mm)

08040300

4

102

3

76

Round

2.93

74

2.68

68

08040400

4

102

3 1/4

83

Round

3.06

74

2.81

71

08040600

4

102

3 1/2

89

Round

3.43

87

3.18

81

08040800

4

102

4

102

Round

3.81

97

3.62

92

08087200

4

102

5

127

Round

4.81

122

4.63

118

08040900

5

127

4

102

Round

3.87

98

3.69

94

08041300

5

127

5

127

Round

4.81

122

4.62

117

08041200

5

127

6

152

Round

5.81

148

4.62

117

08087000

6

152

5

127

Round

4.81

122

4.62

117

08086800

6

152

6

152

Round

5.81

148

5.62

143

08040133

4

102

3 1/4

83

Square

-

-

2.81

71

08040136

4

102

3 1/2

89

Square

-

-

3.25

83

08040142

4

102

4

102

Square

-

-

3.62

92