20541-TRW 45 Degree Metric Female 24 Degree Cone O-Ring Heavy Series Fitting

Our 45 degree metric female 24 degree cone O-ring heavy series fitting, series 20541-TRW, is the heavy-duty (H.T.) version of our 45 degree female elbow range. It is a one-piece crimp-on elbow that connects high pressure braided hose to metric female ports at a fixed 45 degree angle, with a 24 degree cone seat and a pre-installed O-ring. 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.

Conformité et normes :

• DIN 2353 heavy series (H.T.) dimensional standard
• DIN 3865 (raccord métrique à cône de 24 degrés avec joint torique, forme A)
• ISO 8434-1 (géométrie du raccord à cône de 24 degrés)
• Série ISO 12151 (raccords de tuyaux avec connecteurs à cône de 24 degrés)
• SAE J516 (norme de référence générale relative à la conception des raccords pour flexibles hydrauliques)

Why buyers choose this elbow:

• Heavy series rating. The H.T. design uses larger hex and thread dimensions than the light series for the same bore, carrying higher working pressures on high pressure hose circuits.
• 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.
• Un joint torique est fourni avec chaque raccord. Le joint torique s'insère dans le logement conique à 24 degrés et assure l'étanchéité. Pas de ruban adhésif, pas de pâte, pas d'approximations lors du montage.
• Matched to 2SN and 4SP hose. The heavy series profile is the standard partner for SAE 100 R2AT, EN 853 2SN and spiral-wound high pressure hose constructions.

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

The table below lists all 18 sizes of the 20541-TRW 45 degree metric female 24 degree cone O-ring heavy series 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.

Notes: The -RW suffix denotes the braided-hose version; for spiral-wound hose, use series 20542-XX-XXTRW. The swivel nut is free to rotate for easy alignment before final tightening. The 20541 series is the heavy series (H.T.) counterpart of the 20441 light series 45 degree elbow.

Why a One-Piece 45 Degree Elbow

A 45 degree outlet is the preferred routing angle where a hose must change direction without a sharp 90 degree turn. This 45 degree metric female 24 degree cone O-ring heavy series fitting replaces a straight fitting plus a separate elbow adapter, removing two potential leak points and extra length.

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.

Heavy Series vs Light Series – What Is the Difference

The DIN 2353 standard defines two dimensional series for the same 24 degree cone connection: light (L.T.) and heavy (S.T., also written H.T.). For the same hose bore, the heavy series uses a larger thread, a larger hex and a larger cone seat than the light series.

The heavy series carries higher connection pressure ratings, which is why it is the standard choice for high pressure braided hose (SAE 100 R2AT, EN 853 2SN) and for spiral-wound hose assemblies. If your circuit runs above the light series rating, this heavy series elbow is the correct choice.

Fonctionnement du joint torique

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.

Profondeur d'insertion et diamètre extérieur du sertissage : les deux chiffres demandés par les ingénieurs

La profondeur d'insertion correspond à la longueur de la partie cannelée qui pénètre dans l'alésage du tuyau. Le diamètre extérieur après sertissage correspond au diamètre extérieur de la virole après sertissage. Ces deux paramètres déterminent ensemble si l'ensemble résiste à la pression ou présente des fuites au niveau de la zone de sertissage.

HENGHUA publishes the matched insert depth and crimp O.D. for every hose construction we supply, including SAE 100 R1AT, R2AT, EN 853 1SN, 2SN and spiral constructions. 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.

Matériaux et traitements thermiques

• Acier au carbone (standard) : acier au carbone à haute résistance, formé à froid ou forgé à chaud (nuances 20# / 35# / 45#). La queue et le siège conique sont cémentés selon un procédé de cémentation et de trempe afin d'assurer une résistance à la fatigue. La plage de dureté de référence est comprise entre HRC 20 et 28 au cœur, avec une couche superficielle cémentée.
• Finition de surface : Zingage blanc ou de couleur (jaune) avec passivation. Des revêtements en zinc-nickel et Dacromet sont disponibles en option pour répondre à des exigences plus strictes en matière de test au brouillard salin.
• Acier inoxydable (en option) : 304, 316 or 316L stainless steel for corrosive media and washdown environments.
• Élastomère des joints toriques : NBR (nitrile) standard. Le FKM, l'EPDM et d'autres élastomères sont disponibles sur demande pour des fluides et des températures spécifiques.

Valeurs nominales de pression et de température

The connection rating follows the DIN 2353 heavy series reference 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 heavy series (H.T.), higher than the light series ratings for the same bore. Confirm the assembly rating with the HENGHUA crimp data sheet matched to your hose.

Plage de températures : De -40 °C à +100 °C avec le joint torique NBR standard. À des températures élevées, appliquer la réduction de capacité prévue par la norme SAE J517 à la pression de service de l'ensemble. La plage de fonctionnement du joint torique peut être étendue grâce à l'utilisation d'un matériau FKM pour les circuits à haute température.

Essais de pression : HENGHUA est en mesure de fournir des ensembles ayant subi des essais de résistance jusqu'à 100% de la pression de service nominale, avec des certificats d'essai sur demande.

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

Selection is a four-step process. First, confirm your circuit pressure exceeds the light series rating. Second, decide whether the port truly needs a 45 degree outlet. Third, match the hose bore to the dash size. Fourth, match the thread to your port.

Structure des références

Lisez toute référence HENGHUA en trois segments. Exemple : 20541-22-08RW.

Sélectionner par série de tuyaux

The 20541-TRW elbow is designed for high pressure braided hydraulic hose. Recommended matching constructions:

• SAE 100 R2AT (tresse à deux fils) – pour les tailles allant de -04 à -24
• EN 853 2SN (equivalent European construction)
• SAE 100 R1AT and EN 853 1SN (one wire braid) – where the circuit permits
• Spiral constructions (EN 856 4SP / 4SH) – use the 20542 series version

Sélectionner par calibre de filetage

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:

• Petites tailles : M14x1.5, M16x1.5, M18x1.5, M20x1.5 (dash -04 to -06)
• Tailles moyennes : M22x1.5, M24x1.5, M30x2 (dash -06 to -12)
• Grandes tailles : M36x2, M42x2, 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. Use a 90 degree elbow when the hose must turn immediately. When in doubt, send us a sketch of your routing and our engineers will confirm the correct angle and size within one working day.

Références croisées

This series replaces equivalent DIN 3865 / DIN 2353 heavy 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.

Emballage et logistique

Guide de montage : quatre étapes pour un montage sûr du tuyau

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

Étape 1 – Coupez le tuyau à angle droit. Utilisez un coupe-tuyau bien affûté. Une coupe à bords droits permet au raccord de s'emboîter uniformément dans le tuyau. Une coupe biseautée ou irrégulière laisse des espaces vides qui peuvent devenir des points de fuite.

Étape 2 – Marquez la profondeur d'insertion. Mesurez la profondeur d'insertion indiquée dans la fiche technique de sertissage HENGHUA. Tracez une ligne sur la gaine du tuyau à cette distance. Le repère doit rester visible après l'insertion.

Étape 3 – Lubrifiez et insérez. Appliquez une fine couche de lubrifiant de montage compatible à l'intérieur du tuyau et sur l'extrémité cannelée du raccord. Enfoncez le raccord en effectuant un mouvement de rotation jusqu'à ce que le repère de profondeur s'aligne avec l'extrémité du raccord. Arrêtez-vous au niveau du repère. Ne forcez pas au-delà.

Étape 4 – Sertir et vérifier. 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.

Consignes de sécurité – À lire avant de procéder au sertissage

• Ne mélangez jamais les marques. Les flexibles et les raccords de différents fabricants peuvent présenter les mêmes dimensions, mais utiliser des paramètres de sertissage différents. Veillez à toujours utiliser un ensemble flexible, raccord et fiche technique de sertissage compatibles.
• Ne scellez jamais le cône à 24 degrés avec du ruban adhésif. C'est le joint torique situé dans le siège conique qui assure l'étanchéité. L'application de ruban ou de pâte d'étanchéité sur la face du cône endommage le joint torique et compromet l'étanchéité.
• Vérifiez le joint torique avant le montage. Un joint torique coupé, pincé ou durci doit être remplacé. Le joint torique est l'élément d'étanchéité ; ne procédez jamais au montage sans lui.
• Do not substitute light series parts. A light series fitting on a heavy series circuit is an overpressure hazard. Check the series code on the part before assembly.
• 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.
• 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 heavy series 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.

Foire aux questions

What is a 45 degree metric female 24 degree cone O-ring heavy series 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, built to the DIN 2353 heavy series dimensional standard. The 45 degree outlet redirects the hose at a shallow angle to the port axis.

What is the difference between heavy series and light series?

For the same hose bore, the heavy series uses larger thread, hex and cone seat dimensions, which carry higher connection pressure ratings. The light series is more compact and lower cost. This page covers the heavy series (H.T.).

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 20541-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 20541-TRW fitting?

The 20541-TRW version is designed for high pressure braided hydraulic hose such as SAE 100 R2AT and EN 853 2SN. For spiral-wound hose, use the 20542 series.

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 Heavy Series 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.