Choosing Your Barb Size

Our barbed fittings are designed to interface to a wide range of tubing materials. Due to the numerous tubing options on the market, special consideration should be paid when selecting your barb size. The charts below will give you a good idea as to the size barb you will need.

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KENT Systems Quick Couplings

Collection

Tube ID

Tube ID

Barb Diameter

Barb Bore Diameter

Tube ID Range

1 and 4

1/16"

1.5 mm

0.102"

0.060"

0.063 - 0.078"

1 and 4

3/32"

2.25 mm

0.129"

0.076"

0.078 - 0.109"

1 and 4

1/8"

3.00 mm

0.164"

0.096"

0.094 - 0.141"

1 and 4

5/32"

4.00 mm

0.208"

0.122"

0.125 - 0.188"

1 and 4

3/16"

4.75 mm

0.264"

0.155"

0.156 - 0.234"

1,3 and 4

1/4"

6.25 mm

0.335"

0.197"

0.188 - 0.297"

1 and 4

5/16"

8.00 mm

0.425"

0.250"

0.250 - 0.375"

3

3/8"

9.525 mm

0.450"

0.290"

0.360 - 0.390"

3

1/2"

12.7 mm

0.600"

0.300"

0.480 - 0.520"

KENT Systems Luer Fittings

Tube ID

Tube ID

Barb Diameter

Barb Bore Diameter

Tube ID Range

1/16"

1.5 mm

0.102"

0.060"

0.063 - 0.078"

3/32"

2.25 mm

0.129"

0.076"

0.078 - 0.109"

1/8"

3.00 mm

0.164"

0.096"

0.094 - 0.141"

5/32"

4.00 mm

0.208"

0.122"

0.125 - 0.188"

3/16"

4.75 mm

0.264"

0.155"

0.156 - 0.234"

KENT Systems Tube Fittings

Tube ID

Tube ID

Barb Diameter

Barb Bore Diameter

Tube ID Range

1/16"

1.5 mm

0.102"

0.060"

0.063 - 0.078"

3/32"

2.25 mm

0.129"

0.076"

0.078 - 0.109"

1/8"

3.00 mm

0.164"

0.096"

0.094 - 0.141"

5/32"

4.00 mm

0.208"

0.122"

0.125 - 0.188"

3/16"

4.75 mm

0.264"

0.155"

0.156 - 0.234"

1/4"

6.25 mm

0.335"

0.197"

0.188 - 0.297"

5/16"

8.00 mm

0.425"

0.250"

0.250 - 0.375"