ORFS Female Interlock Hydraulic Hose Fitting: 90 Degree Elbow 24293-W Series

Why This ORFS Female Interlock Hose Fitting Passes the Compliance Gate

The ORFS female interlock hose fitting in the 24293-W series is a 90 degree elbow built for spiral (interlock) hose, so it locks onto the hose wire reinforcement instead of relying on the cover alone. That interlock grip holds high-impulse and high-pressure circuits that braided-hose fittings cannot safely handle, which makes it a natural choice for heavy-duty OEM, mining, and construction duty. The ORFS end seals on a flat metal face with a captive O-ring, so the connection stays leak-tight without sealant and is quick to service. For OEM builders, distributors, and repair shops, the 24293-W is a direct route to the ORFS geometry printed on the drawing (ISO 12151-1 / SAE J516 on the sheet).

Core Advantages

• Built for spiral hose. The interlock shell engages the wire reinforcement, so the fitting holds high-impulse and high-pressure duty that braided-hose fittings cannot match.
• 90 degree elbow body. The right-angle bend removes an extra adapter, cuts a leak path, and shortens assembly time in tight manifolds.
• O-ring face seal reliability. A flat-face ORFS swivel nut with a compressed O-ring tolerates pressure and vibration and reseals after service without tape or paste.
• Heavy-duty size range. Four large sizes from 1.3/16″X12 to 2″X12 cover hose dashes 12 to 24, the sizes used on spiral-hose systems.

Technical Specifications

What Is an ORFS Female Interlock Hose Fitting?

ORFS stands for O-Ring Face Seal. The port face is flat and holds an O-ring in a machined groove, while the fitting carries a female swivel nut that presses the two flat faces together until the O-ring is compressed. The seal comes from that compressed O-ring, not from a cone or taper, so the flat faces must stay clean and scratch-free and the O-ring must be sound.

An interlock fitting is made for spiral (interlock) hose rather than braided hose. The shell is pressed over the hose and locks onto the wire reinforcement layer, giving a far stronger grip and a higher pressure rating than a standard crimp. That is why the ORFS female interlock hose fitting in the 24293-W series is used on spiral-hose circuits where impulse and pressure are high.

An ORFS female end is not interchangeable with other North American end styles. ORB (SAE J1926 / ISO 11926) uses a straight thread with an O-ring on a boss face, while JIC 37 degree (SAE J514) and SAE 45 degree (SAE J513) both seal on a metal cone. To identify ORFS, look for a flat end face with an O-ring groove and measure the thread, since an ORFS nut is usually one sixteenth of an inch larger than the JIC nut of the same hose size.

Dimensional Data

The letters below are marked directly on the drawing in the specification sheet (24293-W). Read them as dimensioned on the drawing.

Note that on this sheet the dimension columns are ordered A, C, H, S2, which differs from the braided-hose sheets. Confirm A, C, and H against the customer drawing before release on a tolerance-critical stack-up.

Full Dimension Table (Part Number Matrix)

All dimensions are in millimetres and are transcribed from the 24293-W specification sheet exactly as printed, with the columns in the sheet order A, C, H, S2. The part number reads as series 24293, thread dash, then hose dash, with a W suffix, for example 24293-16-16W = 1.7/16″X12 ORFS thread on a -16 hose.

Spiral hose note: this interlock series is intended for spiral (interlock) hose. For the equivalent braided-hose 90 degree elbow, use the 24291 series; for the spiral version of the braided part number, the sheet rule changes the code to 24292-XX-XX.

Material and Heat Treatment

Working Pressure and Operating Envelope

The working pressure of a finished ORFS female interlock hose fitting is set by both the end connection standard and the spiral hose it is crimped onto, so always use the lower of the two ratings. Every fitting is pressure tested at the factory before it ships, and a matching torque and crimp data table is supplied with the order so the assembly is built to the correct interlock specification.

The ORFS seal suits typical hydraulic temperature ranges of about -40 degrees C to +120 degrees C, with the exact limit set by the hose tube and the O-ring compound. Derate the assembly for high-temperature, high-impulse, or aggressive-fluid duty and confirm the interlock rating against your system pressure.

Selection and Ordering

How to Read the Part Number Matrix

Each part number is built from three blocks, and reading them in order tells you everything you need. Use the matrix row that matches both your port thread and your hose dash, then confirm the leg dimensions A and H fit the routing space.

• Block 1, series: 93 means an interlock 90 degree ORFS female elbow (24293 family).
• Block 2, thread dash: the ORFS thread, for example 12 = 1.3/16″X12, 16 = 1.7/16″X12, 20 = 1.11/16″X12, 24 = 2″X12.
• Block 3, hose dash: the spiral hose bore, for example -12 = DN20, -16 = DN25, -20 = DN32, -24 = DN40.
• W suffix: interlock shell for spiral hose, matching the 24293-W drawing.

Thread Size and Dash Chart

Cross Reference Service

Send us an OEM number, a competitor catalogue number, or an old drawing number and our engineering team will translate it into the closest ORFS female interlock hose fitting part number, including thread dash and hose dash. We confirm the thread and the seal style first, then map the leg dimensions of the ORFS female interlock hose fitting, so the replacement drops into your existing spiral-hose assembly without guesswork. Custom thread, custom leg length, and private-label marking are all available.

Packaging and Logistics

Fittings are packed 10 pieces per box, with a batch box label that carries the part number, thread, hose dash, material, and heat number. Export cartons are palletised and shrink-wrapped for sea and air freight. Country of origin is Made in China, brand HENGHUA, and material test reports (MTR) travel with the shipment on request. Bulk and repeat-order pricing is available for OEM and distributor programmes, and every carton of this ORFS female interlock hose fitting is batch-labelled for full traceability.

Assembly and Use Guide

Four-Step Crimping Procedure

1. Cut the spiral hose square with a vertical cut and remove any debris so the end is clean and burr-free.
2. Skive the hose cover where the interlock shell seats, and mark the insertion depth so the fitting goes on the full, measured distance.
3. Lubricate the hose bore and the fitting insert with a compatible grease and push the fitting in to the mark so the interlock shell engages the wire reinforcement.
4. Crimp to the published interlock crimp diameter, then verify the finished crimp outside diameter with a vernier caliper against the data table.

Connecting the ORFS End

Clean the flat faces of both the fitting and the port, and make sure no oil film, dirt, or burrs are left behind. Inspect the O-ring for cuts or hardening and replace it if there is any doubt, then hand-tighten the swivel nut until the faces touch. Finish with a torque wrench to the value in the supplied data table, and clock the 90 degree elbow to the required position before the final pull.

Never wrap PTFE tape or apply sealant on an ORFS joint. The seal is made by the compressed O-ring on the flat face, and tape or paste can shift under pressure and block a passage. Protect the face from scratches during handling, because a scored face will leak even with a new O-ring.

Installation Warnings

• Do not fit this interlock shell onto braided hose; use it only on the spiral (interlock) hose it is designed for.
• Do not mix ORFS with JIC 37 degree, ORB, or SAE 45 degree ends. The threads and the seal geometry differ, and forcing them damages both parts.
• Do not reuse an O-ring that is cut, flattened, or hardened, and never install the end without an O-ring.
• Do not crimp without the data table; an out-of-spec interlock crimp is the most common cause of a weeping or blown joint.

Correct practice: verify the thread with a gauge, skive and mark the hose correctly, keep the face clean, use a new O-ring, and torque to the published value.

OEM Customization and Quality Traceability

Customization Options

• Laser marking of your logo, part number, and batch code on the fitting body.
• Custom thread sizes and custom leg lengths A and H for special routing needs.
• Choice of carbon steel or 304 / 316L stainless steel, and trivalent zinc, zinc-nickel, or Dacromet finish.
• Private-label packaging and mixed-kit boxes for distributor programmes.

Quality and Traceability System

Every batch is carburized and hardened to HRC 20-28, then 100% pressure tested and thread-gauged before packing. Material test reports, dimensional reports, and batch traceability records are available with the order, and third-party inspection such as BV or SGS can be arranged on request. Each box carries a batch label that links the parts back to the heat number and the inspection record.

FAQ

What is an ORFS female interlock hose fitting? It is a right-angle hydraulic hose fitting with a female ORFS swivel nut, built with an interlock shell that grips the wire reinforcement of spiral hose. The ORFS end seals on a flat face with a captive O-ring, and the interlock grip carries high-impulse, high-pressure duty.

What hose does the 24293-W fit? It is designed for spiral (interlock) hose, not braided hose. The interlock shell must engage the hose wire reinforcement to reach its rated pressure.

How is interlock different from a standard crimp elbow? A standard crimp relies on the hose cover and inner braids, while an interlock shell locks onto the wire reinforcement layer for a much stronger grip. That is why interlock elbows are reserved for spiral-hose circuits.

How do I tell ORFS apart from JIC or ORB? Look at the end face. ORFS has a flat face with an O-ring groove; JIC 37 degree and SAE 45 degree have a metal cone; ORB has a straight thread with an O-ring on a boss. An ORFS nut is usually one sixteenth of an inch larger than the same-size JIC nut.

Do I need PTFE tape or sealant? No. The O-ring makes the seal on the flat face, so tape and paste are not needed and can actually cause problems. Keep the face clean, use a good O-ring, and torque to the data table.

Can I replace the O-ring? Yes. The O-ring is a service part. Use the correct ORFS O-ring for the thread size, keep the groove clean, and never reuse a cut or hardened ring.

What is the difference between the 24293-W and the 24291? The 24293-W is the interlock 90 degree ORFS elbow for spiral hose, while the 24291 is the braided-hose 90 degree elbow whose spiral code changes to 24292-XX-XX as noted on its sheet.

Can you customise the elbow? Yes. We offer custom threads, custom leg lengths, laser marking, private-label packaging, and a choice of material and surface finish.

How fast can you quote? Send the thread size, hose dash, quantity, and any OEM number, and we return a quotation within 24 hours.

Request a Quote

Send your thread size, hose dash, quantity, and any OEM or drawing number, and the HENGHUA team will confirm the exact 24293-W part number and quote within 24 hours. Ask for our interlock crimp and torque data table with your first order.

Browse the full ORFS Hydraulic Fittings range for the complete family, or contact us to request a quote, mill test reports, and samples.