24291-RW 90 Degree ORFS Female O-Ring Seal Fitting

Our 90 degree ORFS female O-ring seal fitting, series 24291-RW, is a one-piece crimp-on elbow that connects braided hydraulic hose to ORFS female ports at a right angle, with a flat face seat and a UNF female thread. It is built to the American ORFS (O-Ring Face Seal) system, where the compressed O-ring carries the seal. The range covers 9/16″-18 to 2″-12 UNF 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:

• SAE J1453 (O-ring face seal / ORFS system)
• ISO 8434-3 (O-ring face seal connectors)
• UNF threads (Unified National Fine, inch based)
• SAE J516 (general hydraulic hose fitting design reference)

Why buyers choose this elbow:

• One-piece 90 degree elbow. Formed from a single forging or cold-headed blank. No weld at the bend, no weak point under impulse pressure.
• The standard right-angle connection. Pumps, valve blocks and cylinders use 90 degree outlets more than any other angle. This elbow covers them with one part.
• ORFS flat face seat. The flat seat receives the O-ring tip of the mating ORFS male connector, creating a zero-leak face seal without metal-to-metal fit-up.
• Full UNF thread range. 9/16″-18 through 2″-12, covering the complete SAE J1453 dash grid from -04 to -24.

90 Degree ORFS Female O-Ring Seal Fitting Technical Specifications

The table below lists all 24 sizes of the 24291-RW 90 degree ORFS female O-ring seal fitting. Dimensions are in millimeters. All threads are UNF (Unified National Fine) with a flat face seat per SAE J1453. Dim. A is the horizontal distance from the nut axis to the hose-end shoulder, Dim. H is the height from the nut face to the hose axis, 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 24292-XX-XXRW. The 24291 series is the 90 degree elbow counterpart of the 24241 45 degree elbow, the 24211 straight ORFS female fitting and the 14211 ORFS male fitting.

Why a One-Piece 90 Degree Elbow

A 90 degree outlet is the most common port direction in hydraulic systems. Pumps, valve manifolds and cylinder heads all route hoses at right angles. This 90 degree ORFS female O-ring seal fitting replaces a straight fitting plus a separate 90 degree 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 compact 90 degree geometry also keeps the hose close to the machine frame, which reduces cover wear and protects the hose from snagging.

How the ORFS Flat Seat Works

The ORFS female fitting carries a flat face seat inside the threaded end. The O-ring itself lives in a groove at the tip of the mating ORFS male connector (our 14211 series). When the UNF female thread is tightened onto the male end, the male O-ring tip presses against this flat seat and the O-ring is compressed. The O-ring, not metal, carries the seal.

This is why ORFS is called the face seal system: the seal happens on the flat face, perpendicular to the thread axis, rather than on a cone. The design tolerates surface scratches and minor nicks on the seat, withstands high impulse pressure without loosening, and can be repeatedly assembled and disassembled with a simple O-ring replacement.

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. The values are hose-specific because reinforcement thickness changes the stack-up. 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. Measure with a digital caliper after every crimp.

Material and Heat Treatment

• Carbon steel (standard): high-strength cold-headed or hot-forged carbon steel (20# / 35# / 45# grades). The tail and flat 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.

Pressure and Temperature Ratings

The connection rating follows the SAE J1453 O-ring face seal 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 SAE J1453 O-ring face seal connection classes. 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 on the mating male end. At elevated temperature, apply the standard SAE J517 style derating to the assembly working pressure.

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 90 Degree ORFS Female O-Ring Seal Fitting

Selection is a four-step process. First, confirm the port needs a right angle. Second, match the hose bore to the dash size. Third, match the UNF thread to your port. Fourth, confirm the hose construction version (-RW for braided, 24292 series for spiral).

Part Number Structure

Read any HENGHUA part number in three segments. Example: 24291-08-08RW.

Select by Hose Series

The 24291-RW 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)

Select by Thread Size

The flat seat receives the O-ring tip of the mating ORFS male connector. All threads are UNF (Unified National Fine):

• Small sizes: 9/16″-18, 11/16″-16, 13/16″-16 (dash -04 to -08)
• Medium sizes: 1″-14, 1.3/16″-12 (dash -08 to -12)
• Large sizes: 1.7/16″-12, 1.11/16″-12, 2″-12 (dash -12 to -24)

The nut rotates freely before tightening, which lets you align the 90 degree outlet in any direction around the port axis.

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

Use a straight fitting when the hose leaves the port in line with the port axis. Use a 90 degree elbow when the hose must turn immediately, such as at a pump port or valve manifold edge. Use a 45 degree elbow when the hose needs a shallow angle change. 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 SAE J1453 ORFS 90 degree female fittings 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 and insert depth checks.

Packaging and Logistics

Assembly Guide: Four Steps to a Safe Hose Assembly

Follow this process for every crimped assembly. It applies to every 90 degree ORFS female O-ring seal 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 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 ORFS flat seat with tape. The O-ring on the mating male end carries the seal. Thread sealant tape or paste on the seat destroys the seal.
• Keep the flat seat clean and undamaged. A burr or deep scratch on the seat can cut the O-ring during assembly. Protect the seat during handling and storage.
• Do not confuse ORFS with JIC. ORFS seals on a flat face with an O-ring; JIC seals with a 37 degree flare cone. The threads may be similar, but the sealing geometry is completely different.
• Align the nut before final tightening. Rotate the 90 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 90 degree ORFS female O-ring seal 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.
• 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 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.

Preguntas frecuentes

What is a 90 degree ORFS female O-ring seal fitting?

It is a one-piece elbow fitting with a UNF female thread and a flat face seat. The seat receives the O-ring tip of the mating ORFS male connector, and the compressed O-ring carries the seal. The 90 degree outlet redirects the hose at a right angle to the port axis.

Why choose a 90 degree elbow instead of a straight fitting?

A 90 degree elbow turns the hose immediately at the port, which is the standard routing at pumps, valve manifolds and cylinder heads. It removes the need for a separate adapter and keeps the hose close to the machine frame.

Does the female fitting include the O-ring?

The O-ring lives in the groove at the tip of the mating ORFS male connector (our 14211 series). The female fitting provides the flat seat. Order the male and female ends together and the connection is complete.

Why does ORFS leak less than JIC?

ORFS seals with a compressed O-ring against a flat face, which tolerates scratches and surface imperfections. JIC seals with metal-to-metal 37 degree flare contact, which can weep under high impulse pressure.

Which hose works with the 24291-RW fitting?

The 24291-RW version is designed for braided hydraulic hose such as SAE 100 R1AT, R2AT and EN 853 1SN / 2SN. For spiral-wound hose, use the 24292 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 90 Degree ORFS Female O-Ring Seal 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.