JIC Female 74° Cone Seat Fitting: 26718-R5T Series

Why This JIC Female Fitting Passes the Compliance Gate

A JIC female 74° cone seat fitting terminates a hydraulic hose with a female UNF thread and an internal 74° cone seat, ready to receive any male JIC 37° flare stud in the circuit. The 26718-R5T series from HENGHUA is a one-piece crimp fitting built to SAE J514 (ISO 8434-2), covering 10 sizes from -04 to -32 with UNF threads from 7/16″-20 to 2-1/2″-12. Every unit is cold-forged from carbon steel, heat-treated, plated, and 100% pressure tested before shipment. For OEM buyers this fitting is a compliance gate; for maintenance teams it is a compact female termination that fits where a long-bodied fitting does not.

• SAE J514 (ISO 8434-2) JIC female end: UNF thread with an internal 74° cone seat (37° flare), sealing metal-to-metal against a male flare stud, with no O-ring and no thread sealant required.
• Short-body single-hex design: the nut collar carries the full hex (S2), and the exposed body between the seal face and the hose is kept short, which reduces the envelope on the machine.
• R5T stem geometry: engineered per the drawing note for fiber-braid and wire-reinforced hose constructions; confirm your exact hose series with our engineers.
• OEM gate check: full dimensional and material conformance per SAE J514, with material test reports (MTR) available for every batch.

Core Advantages

1. Compact exposed length: the short A dimension keeps the fitting envelope small at the port, which helps where clearance is tight.
2. JIC end rated up to 34.5 MPa (5,000 psi): per SAE J514 / ISO 8434-2, with every fitting hydrostatically tested before shipment.
3. -40°C to +120°C operating range: tested across cold-start mobile equipment and hot industrial circuits without seal degradation.
4. 96 to 1000 h salt spray options: trivalent zinc (96 h), zinc-nickel (720 h), or Dacromet (1000 h), matched to your environment.

Technical Specifications

What Is This JIC Female Fitting?

A JIC female fitting is the counterpart of the JIC male: instead of an external cone, it carries a female UNF thread and an internal 74° cone seat. The 74° figure is the included angle of the cone, with each flank 37° from the axis, which is why JIC fittings are also called JIC 37 degree flare fittings. When a male JIC 37° flare stud is tightened into the seat, the two cone faces contact metal-to-metal and the joint seals without O-rings, washers, or sealant. Use the female end when the port you connect to is a male flare stud, which is common on pump outlets, valve ports, cylinder ends, and filter heads.

The 26718-R5T series differs from the double-hex version of this family in two ways that matter on the machine. First, it carries a single hex on the nut collar (S2), which is the only wrenching position needed for most installations. Second, the exposed body length A is kept short: the fitting reaches from the seal face to the hose crimp zone with a minimum of material in between, which shrinks the space the fitting claims at the port. The R5T designation covers the stem geometry for fiber-braid and wire-reinforced hose per the drawing note. Confirm your exact hose series and the matching crimp data sheet with our engineers when ordering, and the correct insert depth and crimp outside diameter will be supplied with the order.

Dimensional Data and Threads

Full dimension drawings with A, C, and S2 callouts are supplied as PDF and CAD (STEP/DWG) files. Because this is a crimp fitting, the two process-critical parameters are the hose insert depth and the crimp outside diameter; both are hose-series specific and are listed in the crimp data sheet that accompanies every order.

Full Dimension Table (Part Number Matrix) {#by-thread-size}

Read the table with your JIC thread (E) and your hose size (dash). The part number is the order code; copy it directly into your inquiry or purchase order. The pattern is 26718-[thread dash]-hose dash: for example, 26718-08-08(R5T) has a 3/4″-16 thread and suits a -08 (12 mm) hose.

The series covers the full dash range of this female family. Confirm your hose construction and the matching crimp data sheet with our engineers before ordering, and the correct insert depth and crimp outside diameter will be supplied with the order.

Matériaux et traitements thermiques

Cold forging preserves the grain flow of the steel, which raises fatigue resistance under pressure pulsation. Each heat-treatment batch is hardness-tested and recorded, so the hardness number on the MTR matches the parts you receive.

Working Pressure

The exact rating for your part number and hose combination is confirmed on the datasheet and by our engineers before shipment.

Pressure-Temperature Operating Envelope

The steel fitting body holds full rated pressure across the whole temperature window. In a crimped assembly the working pressure is governed by the weakest component, normally the hose; use the hose derating curve for the system, and the fitting will not be the limiting part.

Selection and Ordering

The 26718-R5T series covers the full dash range of JIC hydraulic hose fittings for braided and wire-reinforced hose, from -04 to -32, so most orders can be placed directly from the tables below.

How to Read the Part Number Matrix

Find your JIC thread in the E column, then the hose dash size you use. The intersecting row gives the order code, for example a 7/8″-14 thread with a -10 hose gives 26718-10-10(R5T). If your combination is not listed, send us both sizes; a custom JIC female fitting for your hose is machined on request.

JIC Thread Size Chart

Use this chart to identify any JIC fitting by its thread and to confirm the matching hose dash sizes. It is the same mapping used in the matrix above.

Cross Reference Service

Most maintenance teams buy against a legacy part number printed on the old drawing. Send us the OEM or distributor part number you currently use, with a photo of the fitting if possible. Our engineers identify the thread, cone angle, hose size, and body configuration, then confirm the exact 26718-R5T equivalent before you place the order. The service covers JIC 37 degree flare fittings, JIC hydraulic hose fittings, and JIC crimp fittings in your inventory, and interchange confirmation is free. The cross reference sheet is returned in PDF for your records.

Emballage et logistique

Assembly and Use Guide

Four-Step Crimping Procedure

Crimping a JIC female fitting follows the same discipline as any JIC crimp fittings job: the crimp parameters decide everything, so never start without the data sheet.

1. Cut the hose square: use a hose cutter, never a hacksaw or an angle grinder. A square, clean end is the precondition for a uniform ferrule grip.
2. Mark the insert depth: read the insert depth for your hose series from the crimp data sheet and mark the line on the hose cover.
3. Lubricate and insert: apply a thin film of assembly lubricant to the stem and the hose bore, then push the fitting into the hose until the mark meets the ferrule.
4. Crimp and verify: select the die per the crimp table, crimp in one continuous stroke, then measure the crimp outside diameter with a caliper and compare with the tolerance.

Connecting the JIC Female End

Clean the internal 74° cone seat and the mating male 37° flare stud with a lint-free cloth. Thread the male stud into the female end by hand until the cone faces touch, then tighten to the torque listed for the thread size, holding the nut hex S2 with a wrench. JIC 37 degree flare fittings seal by cone contact alone, which is why both cone faces must stay clean and dry. Do not apply sealant to the cone faces.

Installation Warnings

• ❌ Never mix fittings and ferrules from different suppliers, even when the thread and hose sizes look identical. Stem geometry, ferrule hardness, and crimp parameters differ, and a mixed joint will leak or blow off under pressure.
• ❌ Never crimp without the matching crimp data sheet. An under-crimped joint weeps, and an over-crimped joint damages the hose reinforcement.
• ❌ Never recrimp a fitting after a failed attempt, and never reuse a fitting removed from a hose.
• ❌ Never apply sealant to the 74° cone faces. It hardens, blocks metal-to-metal contact, and contaminates the circuit.
• ✔ After assembly, pressure-test the circuit at 1.5x working pressure and inspect all joints for weepage.

OEM Customization and Quality Traceability

Customization Options

• Size and thread customization: non-standard thread and hose combinations and special stem lengths machined to your drawing.
• Surface treatment customization: trivalent zinc (96 h), zinc-nickel (720 h), or Dacromet (1000 h) salt spray grades, selected by your environment and corrosion specification.
• Laser marking: your logo, part number, and batch code laser-marked on the hex for full field traceability.
• Material options: 304/316L stainless for chemical, marine, and food-contact circuits, with passivation certificates.

Quality and Traceability System

Every batch follows a documented flow: incoming steel with mill certificate → cold forging → CNC machining → heat treatment → plating → 100% thread gauge and dimension inspection → pressure test → laser marking → packing. The batch number on the carton links back to the raw material lot, the heat-treatment record, and the inspection report. Material test reports (MTR) are provided with every order on request, and third-party inspection reports (BV/SGS) can be arranged before shipment.

FAQ

Q: What is a JIC female 74° cone seat fitting? A: It is a crimp-on hose fitting with a female UNF thread and an internal 74° cone seat, built to SAE J514 / ISO 8434-2, with a short exposed body and a single hex on the nut collar.

Q: What does R5T mean in the part number? A: R5T is the series designation for this stem geometry. The drawing note states the series is engineered for fiber-braid and wire-reinforced hose constructions. Confirm your exact hose series with our engineers, and the matching crimp data sheet will be supplied with the order.

Q: What is the 74° cone seat? A: The 74° figure is the included angle of the internal cone, with each flank 37° from the axis, the same geometry as a male JIC 37° flare stud. The two cone faces seal metal-to-metal, so no O-ring or sealant is used.

Q: What hose sizes does the 26718-R5T series cover? A: The series covers hose from -04 to -32 (DN 6 to 50). Confirm your exact hose construction with our engineers, and the matching crimp data sheet will be supplied with the order.

Q: Does the female end need sealant or an O-ring? A: No. The 74° cone seat seals metal-to-metal against a male JIC 37° flare stud. Keep both cone faces clean and dry, and tighten to the listed torque. An O-ring is used only on ORFS fittings, which have a flat-face seal geometry.

Q: Can you provide crimp data for my hose? A: Yes. Every order includes the crimp data sheet for your hose construction, with insert depth, crimp outside diameter, and die selection. Correct crimp parameters are what separate reliable JIC crimp fittings from early failures, so we confirm them before shipment. Send us your hose series and brand, and our engineers will confirm the crimp parameters before shipment.

Demander un devis

Tell us the JIC thread, the hose dash size, the hose construction, and the annual quantity. Whether you need stock JIC hydraulic hose fittings for distribution or a custom JIC female fitting for an OEM program, the quoting process is the same. For replacement orders, send the legacy part number and a photo, and our engineers will confirm the interchange before quoting. Every fitting leaves the HENGHUA factory pressure-tested, batch-coded, and backed by a written warranty. Request your quote, crimp data sheet, or drawing pack today, and we will respond within 24 hours.