20441-TRW 45 Degree Metric Female 24 Degree Cone O-Ring Fitting

Our 45 degree metric female 24 degree cone O-ring fitting, series 20441-TRW, is a one-piece crimp-on elbow that connects braided hydraulic hose to metric female ports at a fixed 45 degree angle. The 24 degree cone seat carries a pre-installed O-ring, so the seal is made the moment the swivel nut is tightened. The range covers M14x1.5 to M52x2 threads, dash size -04 to -24, hose bore DN6 to DN40. Every elbow is formed in one piece, without welding, and 100% dimensionally inspected before shipment.

Compliance and standards:

• DIN 3865 (metric 24 degree cone connector with O-ring, Form A)
• ISO 8434-1 (24 degree cone connector geometry)
• DIN 2353 light series (L.T.) dimensional standard
• ISO 12151 series (hose fittings with 24 degree cone connectors)
• SAE J516 (general hydraulic hose fitting design reference)

Why buyers choose this elbow:

• One-piece 45 degree elbow. Formed from a single forging or cold-headed blank. No weld at the bend, no weak point under impulse pressure.
• Saves space and reduces hose stress. A 45 degree outlet shortens the routing path and keeps the hose bend radius within safe limits.
• O-ring included with every fitting. The O-ring sits in the 24 degree cone seat and provides the seal. No tape, no paste, no guesswork at assembly.
• Wide temperature range. Rated for -40°C to +100°C continuous duty with the standard NBR O-ring.

45 Degree Metric Female 24 Degree Cone O-Ring Fitting Technical Specifications

The table below lists all 20 sizes of the 20441-TRW 45 degree metric female 24 degree cone O-ring fitting. Dimensions are in millimeters. Each fitting ships with the O-ring size listed, matched to the cone seat. Dim. A is the horizontal distance from the elbow axis to the hose-end shoulder, Dim. H is the height from the elbow axis to the swivel nut face, Dim. C is the cone zone length, and S2 is the wrench size across flats.

*Rows marked with an asterisk were read from a scanned catalog where some columns shifted during OCR. Thread, hose bore and O-ring columns have been corrected to match the part number logic. Dim. A, C, H and S2 values in these rows must be confirmed against the original HENGHUA spec sheet before ordering large quantities.

Notes: The -RW suffix denotes the braided-hose version; for spiral-wound hose, use series 20442-XX-XXTRW. The swivel nut is free to rotate for easy alignment before final tightening.

Why a One-Piece 45 Degree Elbow

A hydraulic system bends at the port more often than anywhere else. A straight fitting plus a separate elbow adapter adds two potential leak points and extra length. This 45 degree metric female 24 degree cone O-ring fitting replaces that stack with a single component.

The elbow body is formed in one piece by hot forging or cold heading, then machined to tolerance. There is no welded seam at the bend. Our impulse testing found that a one-piece elbow survives pressure cycling significantly longer than a welded two-piece elbow of the same size. The 45 degree outlet also keeps the hose away from sharp edges on the machine frame, which reduces cover wear and extends hose life.

How the O-Ring Seal Works

The O-ring sits in a groove inside the 24 degree cone seat of the swivel nut. When the mating male 24 degree cone stud is tightened, it compresses the O-ring against the cone wall. The O-ring, not the metal cone, carries the seal.

This gives three practical advantages for maintenance teams. First, the seal is forgiving of minor surface scratches on the mating cone. Second, the swivel nut can be re-tightened several times without seal degradation. Third, there is no need for thread sealant, tape or paste.

Insert Depth and Crimp O.D. – The Two Numbers Engineers Ask For

Insert depth is the length of the barbed tail that enters the hose bore. Crimp O.D. is the outside diameter of the ferrule after crimping. Together they decide whether the assembly holds pressure or leaks at the crimp zone.

HENGHUA publishes the matched insert depth and crimp O.D. for every hose construction we supply, including SAE 100 R1AT, R2AT and EN 853 1SN / 2SN. Request our crimp data sheet with your hose model and we will return the exact crimp O.D. and die selection within one working day. Our production testing found that a verified crimp O.D. within the published tolerance (typically +/- 0.2 mm) gives a burst safety margin of 4:1 or higher on the complete assembly.

Material and Heat Treatment

• Carbon steel (standard): high-strength cold-headed or hot-forged carbon steel (20# / 35# / 45# grades). The tail and cone seat are case-hardened with a carburizing and quenching process for fatigue resistance. Reference hardness range is HRC 20-28 on the core with a hardened case.
• Surface finish: white zinc or color (yellow) zinc plating with passivation. Optional zinc-nickel and Dacromet coatings are available for higher salt spray requirements.
• Stainless steel (option): 304, 316 or 316L stainless steel for corrosive media and washdown environments.
• O-ring elastomer: standard NBR (nitrile). FKM, EPDM and other elastomers are available on request for special fluids and temperatures.

Pressure and Temperature Ratings

The connection rating follows the DIN 2353 light series table below. These are reference values (§) for the fitting connection itself. The final working pressure of a hose assembly is set by the hose construction and the approved crimping specification.

§Reference values per DIN 2353 light series. Confirm the assembly rating with the HENGHUA crimp data sheet matched to your hose.

Temperature range: -40°C to +100°C with the standard NBR O-ring. At elevated temperature, apply the standard SAE J517 style derating to the assembly working pressure. The O-ring operating range can be extended with FKM material for high-temperature circuits.

Pressure testing: HENGHUA can supply assemblies proof-tested up to 100% of the rated working pressure, with test certificates on request.

How to Select the Right 45 Degree Metric Female 24 Degree Cone O-Ring Fitting

Selection is a four-step process. First, decide whether the port truly needs a 45 degree outlet. Second, match the hose bore to the dash size. Third, match the thread to your port. Fourth, confirm the hose construction version (-RW for braided, 20442 series for spiral).

Part Number Structure

Read any HENGHUA part number in three segments. Example: 20441-22-08RW.

Select by Hose Series

The 20441-TRW elbow is designed for braided hydraulic hose. Recommended matching constructions:

• SAE 100 R1AT (one wire braid) – for -04 to -24 sizes
• SAE 100 R2AT (two wire braid) – for -04 to -24 sizes
• EN 853 1SN and 2SN (equivalent European constructions)
• DIN EN 857 1SC and 2SC (compact constructions, confirm insert depth)

Select by Thread Size

The swivel nut carries a metric female thread that accepts a male 24 degree cone stud. The O-ring in the cone seat does the sealing, so the mating stud needs no additional sealing element:

• Small sizes: M14x1.5, M16x1.5, M18x1.5 (dash -04 to -06)
• Medium sizes: M22x1.5, M26x1.5, M27x1.5, M30x2 (dash -05 to -12)
• Large sizes: M36x2, M45x2, M52x2 (dash -12 to -24)

The swivel nut rotates freely before tightening, which lets you align the 45 degree outlet in any direction around the port axis.

45 Degree vs Straight vs 90 Degree – Which One Do You Need

Use a straight fitting when the hose leaves the port in line with the port axis. Use a 45 degree elbow when the hose must change direction but a 90 degree elbow would create too sharp a bend. The 45 degree outlet is also the right choice for tight manifolds where a 90 degree elbow would collide with adjacent ports. When in doubt, send us a sketch of your routing and our engineers will confirm the correct angle and size within one working day.

Cross Reference

This series replaces equivalent DIN 3865 / DIN 2353 light series 45 degree metric female fittings with O-ring available in the market. If you hold an OEM part number or a competitor catalog number, send it to our sales team. We confirm the direct replacement within 24 hours, including thread, dash size, hex, insert depth and O-ring size checks.

Packaging and Logistics

Assembly Guide: Four Steps to a Safe Hose Assembly

Follow this process for every crimped assembly. It applies to every 45 degree metric female 24 degree cone O-ring fitting size from dash -04 to -24. Skipping one step is the most common cause of early fitting failure.

Step 1 – Cut the hose square. Use a sharp hose cutter. A square cut face lets the fitting seat evenly inside the hose. A beveled or ragged cut leaves voids that become leak paths.

Step 2 – Mark the insert depth. Measure the insert depth from the HENGHUA crimp data sheet. Mark a line on the hose cover at that distance. The mark must remain visible after insertion.

Step 3 – Lubricate and insert. Apply a thin layer of compatible assembly lubricant to the hose bore and the barbed tail. Push the fitting in with a twisting motion until the depth mark aligns with the tail end. Stop at the mark. Do not force past it.

Step 4 – Crimp and verify. Select the correct die set for your hose and fitting size. Crimp in one continuous stroke. After crimping, measure the crimp O.D. with a digital caliper and compare it with the tolerance on the crimp data sheet. Record the value on your quality log. Then align the swivel nut and tighten it to the torque value on the data sheet.

Safety Warnings – Read Before Crimping

• Never mix brands. Hoses and fittings from different manufacturers may share the same dimensions but use different crimp parameters. Always use a matched hose, fitting and crimp data sheet.
• Never seal the 24 degree cone with tape. The O-ring in the cone seat provides the seal. Thread sealant tape or paste on the cone face damages the O-ring and destroys the seal.
• Check the O-ring before assembly. A cut, pinched or hardened O-ring must be replaced. The O-ring is the sealing element; never assemble without it.
• Align the swivel nut before final tightening. Rotate the 45 degree outlet to its final direction, then tighten. Do not use the hose to twist the nut into position after tightening.
• Tighten to spec. Use the hex S2 and tighten to the torque value on the data sheet. Over-tightening distorts the cone seat. Under-tightening causes vibration loosening.
• Never reuse a crimped fitting. Once crimped, the ferrule zone is work-hardened. A re-crimp cannot restore the original grip.

OEM Customization and Quality Traceability

HENGHUA supplies not only standard sizes but also fully customized 45 degree metric female 24 degree cone O-ring fitting solutions for OEM programs.

Customization Services

• Angle and thread customization. Special bend angles, non-standard thread lengths, and custom tail lengths for your hose construction.
• O-ring elastomer selection. NBR, FKM, EPDM and other elastomers matched to your fluid and temperature range.
• Surface treatment customization. White zinc, color zinc, zinc-nickel and Dacromet coatings, matched to your salt spray requirement from 72 hours up to 720+ hours.
• Laser marking. Your logo, part number and batch code laser-marked on the hex for full traceability.
• Packaging customization. Private-label boxes, barcode labels and mixed-size kits per your BOM.

Quality Traceability

Every HENGHUA batch carries a traceable batch number. The traceability chain covers incoming material certificates, heat treatment records, dimensional inspection reports, O-ring material certificates and final packing lists. Material test reports (MTR) and third-party inspection (BV, SGS or equivalent) can be arranged before shipment. Request our sample batch and audit our quality documentation – we are confident in what it shows.

Frequently Asked Questions

What is a 45 degree metric female 24 degree cone O-ring fitting?

It is a one-piece elbow fitting whose swivel nut carries a metric female thread with a 24 degree cone seat and a pre-installed O-ring. The 45 degree outlet redirects the hose relative to the port axis. The geometry follows DIN 3865 and ISO 8434-1.

Why choose a 45 degree elbow instead of a straight fitting?

A 45 degree elbow removes the need for a separate elbow adapter, saves routing space, and keeps the hose bend radius within safe limits. It is the best choice when the hose must leave the port at a shallow angle.

Is the O-ring included?

Yes. Every 20441-TRW fitting ships with the matching O-ring pre-installed in the cone seat. Spare O-rings can be ordered by the size code listed in the specification table.

Which hose works with the 20441-TRW fitting?

The 20441-TRW version is designed for braided hydraulic hose such as SAE 100 R1AT, R2AT and EN 853 1SN / 2SN. For spiral-wound hose, use the 20442 series.

What is the difference between light series and heavy series?

Light series (L.T.) fittings have smaller hex and thread dimensions for the same bore and are used for lower pressure systems. Heavy series (S.T.) fittings use larger dimensions for higher pressure service. This page covers the light series per DIN 2353.

Can I order stainless steel versions?

Yes. 304, 316 and 316L stainless steel versions are available for the full size range, with the same dimensions, O-ring sizes and crimp behavior.

What is the minimum order quantity?

Stock sizes start from 100 pcs. Customized versions start from 500 pcs per size. OEM annual contracts can be discussed directly with our factory team.

Get a Quote for Your 45 Degree Metric Female 24 Degree Cone O-Ring Fitting

Tell us your hose model, thread size, bend angle and annual volume. We reply with a formal quotation, the matching crimp data sheet and our lead time within one working day. For urgent projects, our engineers support you online with crimp parameter and routing verification.