The 50011 is a DIN 2353 standpipe fitting. It connects metric steel tubing to a hydraulic hose. The tube side seals with a 24° cone and a cutting ring. The hose side grips with a barbed stem.
The fitting does three jobs: hold the cutting ring on the tube, seal at the cone, and grip the hose. Ruihua Hardware machines the 50011 from C45 carbon steel and plates it with zinc-nickel. Every batch is checked for thread accuracy and cone finish before packing.
Why the 50011 Standpipe Matters
Straight profile. The hose stays aligned with the port. Less side load on the coupling, longer hose life.
24° cone seal. Metal-to-metal contact. No O-rings to fail.
Machined, not cast. The cone is cut on a CNC lathe and polished to Ra 0.8. No micro-grooves, no weeping under pressure cycling.
Rolled barbs. The serrations grip the hose cover without cutting it.
Matched sets. Standpipe, ferrule, nut, and cutting ring ship together. Assemblers never mix light and heavy parts.
Light Series vs. Heavy Series
Light series
Tube 6–42 mm, for braided hose
Working pressure to 315 bar
Common: 50011-06-03, 50011-12-08, 50011-18-10
Used in mobile equipment and general industry
Heavy series
Same tube range, thicker walls, bigger barbs
Working pressure to 630 bar
Common: 50011-20-12, 50011-30-20, 50011-38-20
Used in mining, oil field, heavy construction
Heavy series standpipes carry a groove near the hex. You can tell them apart after assembly.
50011 Specifications
Materials and Finish
Item
Value
Body
Carbon steel C45, cold drawn or hot rolled
Plating
Zn-Ni alloy, 8–12 μm, 240+ h salt spray (ASTM B117)
Option
Stainless steel 316L for marine or chemical duty
Temperature
−40 °C to +120 °C (NBR), −40 °C to +150 °C (FKM)
Pressure
Light series to 315 bar; heavy series to 630 bar (static, safety factor 4:1)
Standard
DIN 2353, ISO 8434-1 interface
Light Series Dimensions
Part Number
Tube O.D. (mm)
Hose I.D. (mm)
Dash
A (mm)
C (mm)
50011-06-03
6
5
03
28.5
22
50011-06-04
6
6
04
29.0
22
50011-10-05
10
8
05
31.0
23
50011-10-06
10
10
06
32.0
23
50011-12-06
12
10
06
32.5
23
50011-12-08
12
12
08
33.0
23
50011-15-06
15
10
06
35.5
25
50011-15-08
15
12
08
35.5
25
50011-18-08
18
12
08
36.5
26
50011-18-10
18
16
10
41.0
26
50011-22-10
22
16
10
44.0
28
50011-22-12
22
20
12
44.0
28
50011-22-16
22
25
16
46.0
28
50011-28-16
28
25
16
47.0
30
50011-35-20
35
32
20
56.0
36
50011-42-24
42
40
24
62.0
40
Heavy Series Dimensions
Part Number
Tube O.D. (mm)
Hose I.D. (mm)
Dash
A (mm)
C (mm)
50011-08-04
8
6
04
31.0
24
50011-08-05
8
8
05
33.0
24
50011-08-06
8
10
06
33.0
24
50011-10-04
10
6
04
33.0
26
50011-12-04
12
6
04
34.5
26
50011-12-05
12
8
05
35.5
26
50011-14-06
14
10
06
39.5
29
50011-14-08
14
12
08
40.0
29
50011-14-12
14
20
12
45.5
29
50011-16-08
16
12
08
40.5
30
50011-16-10
16
16
10
45.5
30
50011-20-10
20
16
10
52.0
36
50011-20-12
20
20
12
52.5
36
50011-25-12
25
20
12
56.0
40
50011-25-16
25
25
16
57.0
40
50011-30-16
30
25
16
63.0
44
50011-30-20
30
32
20
64.0
44
50011-38-16
38
25
16
69.0
50
50011-38-20
38
32
20
70.0
50
50011-20-12 heavy series – 20 mm tube, DN20 hose
Where the 50011 Is Used
Excavators and wheel loaders
Tractors and harvesters
Injection molding machines
Hydraulic presses
Oil field and mining equipment
Any machine with metric tubing and a hydraulic hose that needs a straight, leak-free transition.
How to Assemble a 50011 Fitting
Cut the tube square and deburr both edges. A burr pushes the cutting ring off-center and causes a leak.
Slide the nut on first, then the cutting ring with the cutting edge toward the tube end.
Lubricate the cone and cutting ring with assembly paste. No grease with solid particles.
Hand-tighten the nut, mark it with a paint pen, then turn 1.5 turns (light series) or 1.5–2 turns (heavy series, size-dependent).
Push the standpipe fully into the hose. Crimp with the ferrule listed in the part number table. Do not mix light ferrules with heavy standpipes.
Frequently Asked Questions
What is the difference between the 50011 and 50012?
50011 is the straight standpipe for braided hoses. 50012 has a longer barb profile and uses a different ferrule for spiral hose. Use 50011 for one- or two-wire braided hose. Use 50012 for four- or six-wire spiral hose.
Can I mix light and heavy series parts?
No. The tube O.D. is the same, but heavy series cutting rings are thicker and the nuts are larger. Mixed parts will leak. Order the complete set from Ruihua Hardware: standpipe, ferrule, nut, and cutting ring.
Do you sell pre-crimped hose assemblies?
We supply the standpipe and ferrule as loose parts. We also provide crimp data, die set, final crimp diameter, and push-out force, for your hose brand and press. For finished assemblies, Ruihua Hardware works with certified hose shops in Europe and Asia.
How long does the zinc-nickel plating last?
Standard Zn-Ni passes 240 hours of neutral salt spray per ASTM B117 without red rust. We can extend it to 480 hours or switch to black Zn-Ni. For permanent marine exposure, choose 316L stainless steel.
Can I order mixed sample kits?
Yes. Ruihua Hardware stocks kits with 10 pieces each of 50011-06-04, 50011-10-06, 50011-12-08, and 50011-20-12, with matching nuts and rings. Contact us for the sample request form.
