10511 Metric Male 24-Degree Cone Seat HEAVY-Series Hydraulic Hose Fittings

Heavy-duty 24-degree cone hydraulic hose fittings follow the heavy-series (H.T.) thread schedule of the ISO 8434-1 cone system, the bigger-thread partner of the light series for higher-pressure circuits. The 10511 series covers 16 part numbers from DN6 (-04) to DN32 (-20), with metric threads from M14x1.5 to M52x2 that map to DIN heavy-series tube sizes from 6 to 38 mm. If your drawings specify heavy-series ports or your circuit runs 2SN braided hose at pressure classes that rule out light-series threads, this page gives you the full reference: dimensions, part numbers, heavy-versus-light rules and OEM options.

Why Choose These Heavy-Series 24-Degree Cone Hose Fittings

• The heavy-series thread schedule. For every line size the heavy (H.T.) series uses a larger metric thread than the light series – M18x1.5 instead of M16x1.5 on a 10 mm class line – which is what many higher-pressure ports and drawings specify.
• Same ISO 8434-1 24-degree cone geometry. Seals metal-to-metal on the standard 24-degree cone, manufactured to ISO 8434-1 / DIN 3861, so it connects into the DIN-cone machine base.
• Built for braided hose up to DN32. The range covers 1SN/2SN braided hose from DN6 to DN32, with the -20 dash sizes that light-series ranges often skip.
• OEM-ready. Laser marking, custom plating, material test reports and batch traceability for every order.

Standards and traceability. Threads are ISO 724 metric threads. The sealing geometry follows the 24-degree cone heavy series per ISO 8434-1 / DIN 3861, the successor system to the well-known DIN 2353 heavy series. Fittings are designed to pair with wire-braided hose built to EN 853 1SN/2SN or SAE 100 R1AT/R2AT performance classes. Dimensional inspection reports and material test certificates are available for OEM gate checks.

Heavy Series vs Light Series: Which Thread Schedule Do You Need?

In the ISO 8434-1 / DIN cone world there are two thread schedules for the same nominal line size. The light series (L) is specified for many general circuits; the heavy series (H.T., sometimes called S) is specified where the port standard, the pressure class or the machine drawing demands larger threads. The two schedules are NOT interchangeable: the cone angle looks the same, but a light-series fitting will not thread onto a heavy-series port and vice versa.

Note: the two schedules step their tube O.D. differently (light: 6, 8, 10, 12, 15, 18, 22, 28, 35, 42 mm; heavy: 6, 8, 10, 12, 14, 16, 20, 25, 30, 38 mm), which is why the thread for a given nominal size differs between series.

Read the thread callout on the port or the old fitting before ordering. If the drawing says “heavy series” or “H.T.”, or the thread is the heavy schedule for that tube size, the 10511 series is the fitting to use. When in doubt, send a photo of the port and the old fitting – a clear picture shows both the cone angle and lets us confirm the pitch.

24 degrees vs 60 vs 90: the angle decides everything

Heavy or light, the cone angle must match the port. A 24-degree cone will not seal in a 60-degree or 90-degree port seat even when the metric thread fits. ISO 8434-1 / DIN style machines use 24 degrees, the 10611 family uses 60 degrees, and the 10811L family uses 90 degrees.

What does the Tube O.D. column mean?

Each part number lists a Tube O.D. value (6 to 38 mm). This is the DIN heavy-series tube size sharing the same thread and cone geometry – the cross-reference most engineers have on their drawings. If your drawing says “24-degree cone, M30x2, tube 20”, the matching fitting is the row with M30x2 and Tube O.D. 20.

10511 Series Technical Specifications

Materials and processing

• Body material options: high-strength carbon steel (20#/35#/45# grades, cold-formed or machined) as standard; stainless steel 304 or 316L available for corrosive or wash-down environments.
• Surface treatment: zinc plating as standard; yellow, white or black zinc, zinc-nickel and Dacromet coating available for higher salt-spray requirements.
• Heat treatment: hardness and case depth are controlled per drawing to keep the thread and the cone zone fatigue-resistant under heavy-service duty; typical surface hardness range HRC 20-28 (confirm the exact code on your drawing or PO).

Full dimension and part number table

All linear dimensions are in millimeters. E = thread, DN = hose bore, Tube O.D. = the DIN heavy-series tube size sharing this thread and cone geometry, A and C = lengths per the supplier drawing, hex = across flats (the drawing labels this S1; the sheet header lists it as S2 – the value is the body hex, confirmed on the drawing).

Full dimensioned CAD drawings are available on request so your engineers can verify every length and the cone geometry before you commit a batch.

Working pressure: the honest answer engineers need

A crimp hose assembly fails at its weakest link, so the rating of a 10511 fitting depends on the hose you pair it with and the crimp quality. The heavy-series thread envelope is designed for higher-pressure duty than the light series, and wire-braided 2SN hose in this size range typically operates between roughly 80 and 400 bar depending on bore size. Send us your hose specification and we will confirm the working pressure, burst margin and the recommended ferrule for your exact hose brand – the check is free and takes one message. For derating at elevated temperature, follow the hose manufacturer’s pressure-temperature curve, because the rubber cover and tube lose capacity above about +100°C.

Which Fitting Series Do You Need: 10511 (Braided) or 10512 (Spiral)?

The part number changes with the hose construction, because the barb geometry and the crimp parameters are different. This is the first selection check for every order.

When in doubt, check the hose label: braided hose is marked 1SN, 2SN or R1AT, R2AT; spiral hose is marked 4SP, 4SH or similar. Ordering the wrong series means the ferrule will not crimp correctly, so confirm the hose construction before you buy.

Part Number Decoder and How to Order

The 10511 part number carries the whole specification, so purchasing can copy it straight into a PO without another round of emails:

10511 – 22 – 08

• 10511 = 24-degree cone heavy-series (H.T.) fitting for braided hose
• 22 = thread nominal size (here M22x1.5, DIN heavy-series class for 14 mm tube)
• 08 = hose dash size (here DN12, 1/2-inch class bore)

Because one thread size can serve several hose bores, always quote both the thread size and the dash size. If you are replacing an existing fitting, send us a photo of the thread end, the cone and the hose side, plus the hex size, and we will confirm the matching part number the same day. This service is the fastest way to convert an unreadable old part number into a confirmed 10511 order number – and it also confirms whether your port is heavy or light series.

Assembly Guide: Four Steps to a Reliable Crimp

These fittings are crimp-style hose ends: the barbed tail is pushed into the hose and a matching ferrule is crimped over the cover. Follow the four steps below on every assembly.

Step 1 – Cut the hose square. Use a sharp hose cutter or cutoff saw. A square, clean cut lets the ferrule grip the cover evenly. A beveled or ragged cut is the most common cause of pull-out failures.

Step 2 – Prepare the insert depth. Push the fitting tail into the hose until it bottoms firmly against the internal shoulder. The hose end must sit at the full insertion depth, not short, or the crimp zone will be wrong.

Step 3 – Lubricate and insert. Apply a thin film of assembly lubricant to the hose bore and the barb. Push the fitting in with a steady twisting motion until it bottoms out, then wipe away excess lubricant. Do not use grease on the cone face.

Step 4 – Crimp and verify. Crimp the matched ferrule with the hose manufacturer’s crimp specification. After crimping, always measure the crimp outside diameter with a caliper and compare it with the crimp table. The measured value must sit inside the allowed tolerance band. If it is out of tolerance, do not put the assembly into service – cut it off and re-crimp with a corrected setting.

Warnings: three mistakes that cause leaks and blow-outs

• Never mix heavy-series and light-series fittings. The cone angle looks identical but the thread schedules are different for the same line size – a heavy fitting will not thread onto a light port and vice versa.
• Never mix cone-angle families. A 24-degree cone fitting must go into a 24-degree port seat; 60-degree and 90-degree ports take their own series.
• Never mix hoses, fittings and ferrules from different manufacturers, and never put PTFE tape or sealant on the straight metric thread. The cone does the sealing; tape adds nothing and can contaminate the system.

Typical Applications

The heavy-series 24-degree cone thread schedule is specified wherever the circuit pressure class, the port standard or the machine drawing demands larger threads than the light series allows:

• High-pressure hydraulic power units and presses
• Plastic injection and die-casting machinery
• Mining, tunneling and construction equipment
• Mobile and agricultural machinery with heavy-duty circuits
• Marine and offshore auxiliary systems
• Machine tools and general industrial hydraulics on heavy-series ports

Wherever the port carries a machined 24-degree cone seat in the heavy-series thread schedule, the 10511 series is the direct hose connection for braided hose circuits.

OEM Customization and Quality Traceability

For equipment builders and large maintenance programs, the 10511 series can be adapted to your exact drawing and your traceability rules.

Customization options

• Thread and geometry: special threads, modified lengths and non-standard barb configurations machined to your drawing or to a sample.
• Surface treatment: zinc-nickel, Dacromet or other coatings for higher salt-spray grades; we confirm the achieved test hours for the coating you choose instead of quoting a generic number.
• Laser marking: your logo, part number and batch or date code laser-marked on the hex for full field traceability.
• Material: stainless steel 304/316L versions for corrosive media or wash-down duty.
• Packaging and kitting: custom labels, barcodes, poly-bag or box quantities, and complete hose assembly kitting.

Quality documentation

• Batch number traceability: every order carries a batch code that links back to the production records.
• Material test reports (MTR) available for carbon steel and stainless batches.
• Dimensional inspection reports for OEM gate checks.
• Third-party inspection (BV, SGS or similar) can be arranged before shipment.

Samples and MOQ. Samples for stock sizes ship fast, and we keep low MOQs for standard part numbers so distributors can test the series without tying up capital. OEM programs can move to scheduled deliveries once the drawing is approved.

Packaging and Logistics

Standard export packing: fittings are individually poly-bagged or boxed to protect threads and cone faces, then packed in export cartons labeled with part number, quantity and batch code. Custom labeling, kitting and barcode requirements are available for distributors and OEMs. Exact carton quantity, gross weight and CBM are confirmed on the packing list for every order so you can calculate freight before you commit.

FAQ

Q: What is a heavy-series 24-degree cone hydraulic hose fitting? A: It is a crimp-style hose fitting with a metric male thread that seals metal-to-metal on a 24-degree cone per ISO 8434-1 / DIN 3861, built to the heavy-series (H.T.) thread schedule. Heavy series uses larger threads than the light series for the same nominal line size.

Q: What is the difference between heavy series and light series? A: The two 24-degree cone schedules use different thread sizes for the same line. For a 10 mm class line, the light series uses M16x1.5 and the heavy series uses M18x1.5. Heavy and light are not interchangeable.

Q: Which series should I order – 10511 or 10512? A: 10511 is for wire-braided hose (1SN/2SN or R1AT/R2AT) and 10512 is for spiral hose (4SP/4SH style). Confirm the hose construction on the label before ordering.

Q: Is this the same as a light-series 10411 fitting? A: No. Both are 24-degree cone fittings, but the 10511 follows the heavy-series thread schedule while the 10411 follows the light-series schedule. Match the thread callout on your port exactly.

Q: Is this the same as a 60-degree or 90-degree cone fitting? A: No. The cone angle is different (24 degrees here, 60 in the 10611 family, 90 in the 10811L family), and the cone surfaces do not mate across families.

Q: Do I need thread tape or sealant on the male thread? A: No. The 24-degree cone does the sealing. Tape on a straight metric thread is useless and can contaminate the system. Use tape only on taper threads.

Q: What is the working pressure of these fittings? A: The assembly rating depends on the hose, the ferrule and the crimp quality. The heavy-series thread envelope is designed for higher-pressure duty than the light series. Send your hose specification and we will confirm the working pressure and the recommended ferrule for your combination.

Q: Can you make custom part numbers with my logo? A: Yes. We offer laser marking, custom plating, stainless versions and special dimensions, with MTR and batch traceability for OEM programs.

Order Today: Heavy-Duty 24-Degree Cone Hydraulic Hose Fittings with Confirmed Fit

Every 10511 heavy-duty 24-degree cone hydraulic hose fitting in this range is made to controlled dimensions, inspected before packing and backed by batch traceability. Send us your hose type, thread size and a photo of the port or the old fitting, and you will get a confirmed part number, a heavy-or-light-series check, a delivery date and a quote within one working day. Request samples first if you want to test the fit on your own bench. Whether your circuit is a heavy-series drawing or a retrofit of an existing machine, we make sure the fitting, ferrule and hose work as one leak-free assembly.