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Parker Hannifin Corporation
Parflex Division
Ravenna, Ohio
235
Coiled Air Hose,
Fittings
& Accessories
Hydraulic &
Pneumatic
Hose & Fit.
PTFE
Hose &
Fittings
The
rmoplastic
Tu
bing
Truck (Fleet)
Products
Tooling &
Equipment
Hose
Accessories
Technical &
Design
Information
Approvals &
Guides
Alphanumeric
Index
Dash Sizes for Hose and Tubing
1/8
3,2
-2
–
–
–
3/16
4,8
-3
-4
-4
5
1/4
6,3
-4
-5
-5
6
5/16
7,9
-5
-6
-6
8
3/8
9,5
-6
–
–
10
13/32
10,3
-6.5
-8
-8
–
1/2
12,7
-8
-10
-10
12
5/8
15,9
-10
-12
-12
16
3/4
19,1
-12
–
–
20
7/8
22,2
-14
-16
-16
–
1
25,4
-16
–
–
25
1-1/8
28,6
–
-20
-20
–
1-1/4
31,8
-20
–
–
32
1-3/8
34,9
–
-24
-24
–
1-1/2
38,1
-24
–
–
40
1-13/16
46,0
–
-32
-32
–
2
50,8
-32
–
–
–
Dash Number
for all SAE Hose
Except 100R5
Inches
Millimeters
Nominal Hose I. D.
or Tubing O. D.
Dash Number
for
SAE 100R5
Dash Number
for
TFE Hose
Nominal
DIN
Size
Dash sizes are commonly used to designate hose I. D., plastic tubing and metal tubing O. D. and coupling size.
Dash size systems in common use: