Hose Reference Chart Index

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Hose Sizes

Dash Size

Inside Diameter
Nominal "NW" or "DN"
in.
mm
-3
3/16
4.8
4
-4
1/4
6.3
6
-5
5/16
7.9
8
-6
3/8
9.5
10
-8
1/2
12.7
13
-10
5/8
15.9
16
-12
3/4
19.1
20
-16
1
25.4
25
-20
1-1/4
31.8
32
-24
1-1/2
38.1
38
-32
2
50.8
50
 

Hose Sizes (100R5)

Dash Size

Inside Diameter
Nominal "NW" or "DN"
in.
mm
-4
3/16
4.8
5
-5
1/4
6.3
6
-6
5/16
7.9
8
-8
13/32
10.3
10
-10
1/2
12.7
12/13
-12
5/8
15.9
16
-16
7/8
22.2
20
-20
1-1/16
28.6
25
-24
1-3/8
34.9
32
-32
1-13/16
46.0
40/50
-40
2-3/8
60.3
60
 

PTFE Hose

Dash Size

Inside Diameter
in.
mm
-3
1/83.2
-4
3/165.0
-5
1/46.5
-6
5/168.0
-8
13/3210.5
-10
1/213.0
-12
5/816.0
-14
3/419.0
-16
7/822.0
-18
125.0
-20
1-1/829.0