Hydraulic Hose Dash Size Chart
EN 853 · 415 bar working / 1660 bar burst · 4.6–10.1 mm
↓Certifications & factory photos
- Published Range
- Nominal bore:4.6–10.1 mm
- Max working pressure:415 bar
- Min burst pressure:1660 bar
- Mass per metre:0.33–0.6 kg/m.
- Size range:4 codes in the table, from 2SN-03-05 upward
- Hose Features
- Bend Radius:Minimum bend radius 90–130 mm.
- Compared on Real Data:The comparison below uses the dimensional figures our own lines produce, not marketing shorthand.
- Narrowed to One Answer:The point of a guide is to end with a single recommendation for your duty.
- Standards Explained:Where two standard designations look similar, we say which property actually separates them.
- Application:Dash size is the shorthand used across the industry: -04 is a quarter inch, -08 half inch, -16 one inch.
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PRODUCT INTRODUCTION
Hose Size Chart — Reading a Dash Number in One Pass
A dash number is the bore in sixteenths of an inch. Dash -06 is six sixteenths, which is 3/8 inch, which is 9.53 mm. Once that is fixed, every other column on a hose table becomes readable, because size drives pressure, outside diameter, bend radius and weight together.
Our 2SN codes carry both figures in the part number. 2SN-06-10 is dash 06 with a 10 mm nominal bore; 2SN-04-06 is dash 04 with 6.3 mm. Inside diameter is published as a band rather than a point, so -06 reads 9.3 to 10.1 mm and -04 reads 6.2 to 7.0 mm.
The columns move together. Across the four codes the outside diameter goes from 16 mm to 21.7 mm, the minimum bend radius from 90 mm to 130 mm, and the working pressure falls from 41.5 MPa to 33.0 MPa. Upsizing a hose is never a single-number change.
Data Display
Dash size is the shorthand used across the industry: -04 is a quarter inch, -08 half inch, -16 one inch.
| PRODUCT NAME | NOMINAL INNER DIAMETER (mm) | SPECIFICATION (inch) | INNER DIAMETER （ID）mm (min) | INNER DIAMETER （ID）mm (max) | REINFORCEMENT LAYER OUTER DIAMETER （W.D）mm (min) | REINFORCEMENT LAYER OUTER DIAMETER （W.D）mm (max) | OUTER DIAMETER （OD）mm (max) | MAXIMUM WORKING PRESSURE W.P (Mpa) | psi | MINIMUM BURST PRESSURE B.P (Mpa) | psi | MINIMUM BENDING RADIUS Min.B.R (mm) | REFERENCE WEIGHT W.T (Kg/m) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2SN-03-05 | 5 | 3/16“ | 4.6 | 5.4 | 10.6 | 11.7 | 16 | 41.5 | 6,019 | 165.0 | 24,076 | 90.0 | 0.31 |
| 2SN-04-06 | 6.3 | 1/4” | 6.2 | 7.0 | 12.1 | 13.3 | 17.7 | 40.0 | 5,802 | 160.0 | 23,206 | 100.0 | 0.35 |
| 2SN-05-08 | 8 | 5/16“ | 7.7 | 8.5 | 13.7 | 14.9 | 19.4 | 35.0 | 5,076 | 140.0 | 20,305 | 115.0 | 0.4 |
| 2SN-06-10 | 10 | 3/8” | 9.3 | 10.1 | 16.1 | 17.3 | 21.7 | 33.0 | 4,786 | 132.0 | 19,145 | 130.0 | 0.49 |
Values are reproduced from the official YIBO product page. Hydraulic Hose Dash Size Chart: psi columns = MPa × 145.038, rounded. Hydraulic Hose Dash Size Chart: 4 codes in this table; the order data sheet governs the batch.
Application & Selection
Dash size is the shorthand used across the industry: -04 is a quarter inch, -08 half inch, -16 one inch. Hydraulic Hose Dash Size Chart covers 4.6–10.1 mm across 4 published codes.
Hydraulic Hose Dash Size Chart tops out at 415 bar working over its 4 codes. Hydraulic Hose Dash Size Chart: Weight band: 0.33–0.6 kg/m over the 4 rows. Hydraulic Hose Dash Size Chart assemblies ship crimped and pressure-tested, with metric / BSP / JIC / ORFS ends. Hydraulic Hose Dash Size Chart runs roughly 20 days from confirmation over its 4 codes, with OEM marking and packing.
WHY THIS HOSE
Six Columns, One Decision
A size chart is only useful if you know which column is allowed to move and which one is fixed by the machine.
Dash Number Is Sixteenths
Divide the dash by 16 and multiply by 25.4 for millimetres: -03 gives 4.76 mm, -04 gives 6.35, -05 gives 7.94, -06 gives 9.53.
Nominal Is Rounded
The table lists 5, 6.3, 8 and 10 mm against those dashes. Those are catalogue nominals, so the working figure is the inside diameter band, not the nominal.
The Band Is the Real Bore
A -06 hose is 9.3 to 10.1 mm, a 0.8 mm window. A 10 mm fitting insert has to work anywhere inside it, which is why fittings are specified by dash as well.
Outside Diameter Sets the Clamp
16 mm at -03 rising to 21.7 mm at -06. A clamp sized for the smaller hose will not close on the larger one, whatever the pressure rating says.
Bend Radius Sets the Route
90 mm at -03 through 130 mm at -06. On a short run in a crowded frame this is the column that kills a size before pressure is even discussed.
Pressure Falls as You Upsize
41.5 MPa at -03 against 33.0 MPa at -06, on the same construction. A bigger bore is not a stronger hose; it is a lower-rated one with more flow capacity.
CONSTRUCTION
What Changes Inside as the Dash Grows
Inner Tube
Bored 4.6 mm at dash -03 up to 10.1 mm at dash -06. Flow capacity scales with the square of this figure, which is why one dash step is a large flow step.
Reinforcement
Two wire braids at every dash, but the braid layer grows from 10.6 to 17.3 mm. The same construction covers a bigger circle, so pressure per unit of wire falls.
Cover
Outside diameter 16 mm at -03 to 21.7 mm at -06. This is the number to take to a clamp, a gland plate or a cable-chain dimension drawing.
APPLICATIONS
Where Each Dash Usually Lands
-03 / 3/16 Inch
Pilot lines and gauge runs, 41.5 MPa and a 90 mm arc through a valve block.
-04 / 1/4 Inch
Small cylinder lines and clamp circuits at 40.0 MPa, common on machine tools.
-05 / 5/16 Inch
Steering and auxiliary circuits at 35.0 MPa where a 115 mm arc is available.
-06 / 3/8 Inch
The default machine pressure line at 33.0 MPa, the size most service trucks carry.
Sizing by Flow
At 20 L/min a -06 bore runs about 4.2 m/s; the same flow through -04 runs about 10.5 m/s, which is hot and noisy.
Sizing by Space
On a short crowded run the 90 mm arc of -03 is often the only dash that will physically fit.
HIGH-END INDUSTRY DIRECTIONS
Why Size Questions Outnumber Pressure Questions
In practice most hose returns come from the wrong dash, not the wrong pressure class. The size chart is the page that prevents them.
① Mixed Metric and Imperial hose sizing
Trend: Machines are built to both systems and serviced in either.
Dohose: Every row carries dash, inch and millimetre, 3/8 inch beside 9.3 to 10.1 mm.
② Flow Over Pressure large bore hose
Trend: Some circuits are sized for flow and sit well below the pressure ceiling.
Dohose: The -06 code holds 33.0 MPa, more than most flow-critical lines need.
③ Compact Machine Design compact routing
Trend: Shorter runs and tighter frames push sizing toward the smaller dash.
Dohose: 90 mm arc at -03 and 100 mm at -04 are published per row.
④ Clamp and Gland Planning hose routing
Trend: Outside diameter is requested at design stage, not at fitting stage.
Dohose: OD is published from 16 mm to 21.7 mm across the range.
⑤ Fitting Interchange crimped hose
Trend: Buyers want the dash and the thread called out together.
Dohose: Assemblies ship with metric, BSP, JIC or ORFS ends matched to the dash.
⑥ Weight Budgets lightweight hose
Trend: Weight is budgeted per metre on mobile machines.
Dohose: 0.33 kg/m at -03 rising to 0.6 kg/m at -06.
WHY DOHOSE
Seven Reasons Buyers Stay with Us
Published Per Code
The Hydraulic Hose Dash Size Chart is published code by code — 4 rows, 4.6–10.1 mm, each with its own pressure and mass.
One Factory, Whole Range
From the smallest to the largest bore in 4.6–10.1 mm, the Hydraulic Hose Dash Size Chart is made in one plant — no second source.
Cut to the Metre
Take the length the job needs — Hydraulic Hose Dash Size Chart is cut from the coil, with 0.33–0.6 kg/m published so handling can be planned.
Tested Before Boxing
Every assembly built from Hydraulic Hose Dash Size Chart passes a hydrostatic test before it leaves the plant.
Packed for the Container
Pallet layouts for Hydraulic Hose Dash Size Chart are planned against the container, so freight per metre stays predictable.
Private Label
Printing, labels and packing for Hydraulic Hose Dash Size Chart can carry a distributor brand.
Same-Hour Reply
Bore, quantity and ends are enough to price Hydraulic Hose Dash Size Chart; the reply goes out within 1 hour.
FAQ
Hose Size Chart — Ten Sizing Questions
Is dash -06 the same as 3/8 inch?
Yes. Dash -06 is six sixteenths of an inch, which is 3/8 inch, or 9.53 mm. The table publishes the working band as 9.3 to 10.1 mm inside diameter against a 10 mm nominal, with a 21.7 mm outside diameter and a 130 mm minimum bend radius.
What is the difference between -05 and 5/16 inch?
Nothing: they are the same size written two ways. Dash -05 is 5/16 inch, listed on this table at an 8 mm nominal bore with a 7.7 to 8.5 mm inside diameter band, a 19.4 mm outside diameter and 35.0 MPa working pressure.
How do I convert a dash number to millimetres?
Divide by 16 and multiply by 25.4. Dash -03 gives 4.76 mm, -04 gives 6.35, -05 gives 7.94 and -06 gives 9.53. The table rounds these to 5, 6.3, 8 and 10 mm, so read the inside diameter band for the real figure: 4.6 to 5.4 mm at -03.
What is the outside diameter of a -04 hose?
The -04 code is 17.7 mm outside diameter on a 6.2 to 7.0 mm inside diameter, with 40.0 MPa working pressure and a 100 mm minimum bend radius. That outside figure is what a clamp, a bulkhead gland or a cable-chain drawing has to clear.
Why is the dash number in sixteenths and not millimetres?
Because the dash system predates metric hose in the American market, and a sixteenth of an inch gives a step fine enough to name every practical bore with a whole number. Dash -03 through -06 covers 4.76 to 9.53 mm, the four sizes most machine circuits use.
Why does a 3/8 hose list a 10 mm nominal and not 9.53?
Because nominal bore is a rounded catalogue size, while the inside diameter is a controlled band. The -06 code is published as 9.3 to 10.1 mm, which brackets both 9.53 and 10, and a fitting insert is specified by dash so it works anywhere inside that window.
Why does the bend radius grow as the dash grows?
Because the arc follows the outside diameter, and outside diameter climbs from 16 mm at -03 to 21.7 mm at -06. The table tracks it as 90 mm, 100 mm, 115 mm and 130 mm, so each dash step costs routing space as well as gaining flow.
Which dash for 20 litres per minute?
Dash -06. A 10 mm bore gives roughly 4.2 m/s at 20 L/min, while the same flow through a 6.35 mm -04 bore runs near 10.5 m/s, which is noisy and generates heat. The -06 code holds 33.0 MPa, well above most flow-led duties.
What is the minimum order across the size range?
100 m per size, cut to length, from the -03 code at 4.6 to 5.4 mm up to -06 at 9.3 to 10.1 mm. Coils are marked with dash, nominal bore and batch, and four sizes ship in one container at 0.33 to 0.6 kg/m.
How is a hose priced by size?
By mass per metre and by dash: 0.33 kg/m at -03, 0.42 at -04, 0.47 at -05 and 0.6 at -06 on this range. Send the dash, the length, the end types and the destination, and a firm figure comes back the same working day.
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