JIC Female Double Hexagon Fitting: 26711D Series

Why This JIC Female Double Hexagon Fitting Passes the Compliance Gate

A JIC female double hexagon fitting terminates a braided hydraulic hose with a female UNF thread and an internal 74° cone seat, ready to receive a male JIC 37° flare stud. The 26711D series from HENGHUA is a one-piece crimp fitting built to SAE J514 (ISO 8434-2) with two hex wrenching positions on the body, covering 14 sizes from -04 to -20 with UNF threads from 7/16″-20 to 1-7/16″-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 the fitting that stays serviceable in the tightest compartments.

• 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.
• Double hexagon body: two hex sections at the female end give technicians a second wrenching position wherever access is tight.
• Comprobación de la compuerta del fabricante original (OEM): Conformidad total en cuanto a dimensiones y materiales según la norma SAE J514, con informes de ensayo de materiales (MTR) disponibles para cada lote.

Ventajas principales

1. Resistencia nominal del extremo JIC de hasta 34,5 MPa (5.000 psi): según las normas SAE J514 e ISO 8434-2; cada racor se somete a pruebas hidrostáticas antes de su envío.
2. Rango de funcionamiento de -40 °C a +120 °C: probado en equipos móviles de arranque en frío y en circuitos industriales en caliente sin que se haya producido degradación de las juntas.
3. Double hexagon access: the two hex sections are machined to the same across-flats size, so a single wrench size serves both positions and the joint can be worked from either side.
4. Opciones de ensayo de niebla salina de 96 a 1.000 h: zinc trivalente (96 h), zinc-níquel (720 h) o Dacromet (1000 h), según el entorno de uso.

Especificaciones técnicas

What Is a JIC Female Double Hexagon Fitting?

A JIC female fitting is the female counterpart of the JIC male 37° flare stud: instead of a male cone, it carries a female UNF thread with an internal 74° cone seat. When a male JIC 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. 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. This connection family is the default on American-built construction equipment, agricultural machinery, trucks, and industrial machines.

The double hexagon design exists for one reason: access. Most female fittings carry a single hex, and in a crowded valve compartment there is often no room to swing a wrench around it. The 26711D series carries two hex sections at the female end, both machined to the same across-flats size. You can hold one hex and torque the male stud into the seat, or use the second hex when the first is buried behind other lines. One wrench size fits both positions, which simplifies the tool kit on service trucks and production lines.

Datos dimensionales y roscas

Full dimension drawings with A, C, S1, 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.

Tabla completa de dimensiones (matriz de referencias) {#by-tamaño-de-rosca}

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 26711D-[thread dash]-[hose dash]: for example, 26711D-08-08 has a 3/4″-16 thread and suits a -08 (12 mm) braided hose. The D in the series number designates the double hexagon body. If you need the same geometry for spiral hose, order the 26712D series.

The dimensions shown are for braided hose. For spiral hose use the 26712D series, whose stem is longer to engage the extra reinforcement layers.

Material y tratamiento térmico

El forjado en frío conserva el sentido de las fibras del acero, lo que aumenta la resistencia a la fatiga ante las pulsaciones de presión. Cada lote sometido a tratamiento térmico se somete a pruebas de dureza y se registra, por lo que el valor de dureza que figura en el certificado de material (MTR) coincide con el de las piezas que recibes.

Presión de trabajo

Las características técnicas exactas de la combinación de tu número de referencia y manguera se confirman en la ficha técnica y por parte de nuestros ingenieros antes del envío.

Ámbito de funcionamiento de presión y temperatura

El cuerpo del racor de acero soporta la presión nominal completa en todo el intervalo de temperaturas. En un conjunto con racor prensado, la presión de trabajo viene determinada por el componente más débil, que suele ser la manguera; utilice la curva de reducción de presión de la manguera para el sistema y el racor no será el elemento limitante.

Selección y pedido

The 26711D series covers the full common range of JIC hydraulic hose fittings for braided hose, from -04 to -20, so most orders can be placed directly from the tables below.

Cómo interpretar la tabla de referencias

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 3/4″-16 thread with a -08 hose gives 26711D-08-08. If your combination is not listed, send us both sizes; a custom JIC female fitting is machined on request.

Tabla de tamaños de roscas JIC

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.

Servicio de referencias cruzadas

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 26711D 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.

Embalaje y logística

Guía de montaje y uso

Procedimiento de engastado en cuatro pasos

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. Corta la manguera en ángulo recto: use a hose cutter, never a hacksaw or an angle grinder. A square, clean end is the precondition for a uniform ferrule grip.
2. Marca la profundidad de inserción: read the insert depth for your hose series from the crimp data sheet and mark the line on the hose cover.
3. Lubricar e introducir: 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. Engarzar y comprobar: 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. Start the male stud by hand until the cone faces touch, then tighten to the torque listed for the thread size. Use whichever of the two hex sections has clearance, and hold the other with a second wrench to take the reaction torque on stiff joints. The metal-to-metal cone does the sealing, so no tape and no sealant is applied to the cone faces. JIC 37 degree flare fittings seal by cone contact alone, which is why both faces must stay clean and dry.

Advertencias sobre la instalación

• ❌ Nunca mezcles racores y casquillos de diferentes proveedores, aunque las medidas de la rosca y de la manguera parezcan idénticas. La geometría del vástago, la dureza del casquillo y los parámetros de engarzado difieren, y una unión mixta presentará fugas o se soltará bajo presión.
• ❌ 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 seat or the male flare cone. It hardens, blocks metal-to-metal contact, and contaminates the circuit.
• ❌ Do not use a fixed female fitting where the hose must rotate under pressure; that requires a swivel version of the connection.
• ✔ Tras el montaje, somete el circuito a una prueba de presión a 1,5 veces la presión de servicio y comprueba que no haya fugas en todas las uniones.

Personalización OEM y trazabilidad de la calidad

Opciones de personalización

• Personalización del tamaño y la rosca: non-standard thread and hose combinations, special stem lengths, and custom hex configurations machined to your drawing.
• Personalización del tratamiento superficial: zinc trivalente (96 h), zinc-níquel (720 h) o Dacromet (1000 h), según las condiciones ambientales y las especificaciones de corrosión.
• Marcado láser: su logotipo, el número de pieza y el código de lote marcados con láser en el hexágono para garantizar una trazabilidad completa.
• Opciones de materiales: Acero inoxidable 304/316L para circuitos químicos, marinos y en contacto con alimentos, con certificados de pasivación.

Sistema de calidad y trazabilidad

Cada lote sigue un proceso documentado: recepción del acero con certificado de fábrica → forjado en frío → mecanizado CNC → tratamiento térmico → recubrimiento → inspección de las dimensiones y del calibre de rosca 100% → prueba de presión → marcado láser → embalaje. El número de lote que figura en la caja de cartón remite al lote de materia prima, al registro de tratamiento térmico y al informe de inspección. Se facilitan informes de ensayo de materiales (MTR) con cada pedido previa solicitud, y se pueden tramitar informes de inspección de terceros (BV/SGS) antes del envío.

Preguntas frecuentes

Q: What is a JIC female double hexagon fitting? A: It is a crimp-on hose fitting with a female UNF thread and an internal 74° cone seat on the port end, built to SAE J514 / ISO 8434-2. The 74° figure is the included cone angle; each flank is 37° from the axis, the same geometry as a male JIC 37° flare stud.

Q: Why does this fitting have two hexagons? A: The double hexagon gives two wrenching positions at the female end, both machined to the same across-flats size. In confined installations you use whichever hex has clearance, and a second wrench can take the reaction torque on stiff joints.

Q: When do I use a female fitting instead of a male fitting? A: Use a female fitting when the port you are connecting to is a male flare stud, which is common on pump outlets, valve ports, cylinder ends, and filter heads. Match the fitting end to the port: male ports take female fittings, and female ports take male fittings.

Q: What hose does the 26711D series fit? A: The series is designed for braided hose, typically EN 853 1SN/2SN or SAE 100R1AT/R2AT constructions from -04 to -20. For spiral hose use the 26712D series, which has a longer stem for the extra reinforcement layers.

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.

P: ¿Podéis facilitarme los datos de engaste para mi manguera? R: Sí. Cada pedido incluye la ficha técnica de engaste correspondiente al modelo de su manguera, con la profundidad de inserción, el diámetro exterior del engaste y la selección de matrices. Unos parámetros de engaste correctos son lo que distingue a los racores de engaste JIC fiables de los que sufren fallos prematuros, por lo que los confirmamos antes del envío. Envíenos la serie y la marca de su manguera, y nuestros ingenieros confirmarán los parámetros de engaste antes del envío.

Solicitar un presupuesto

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 double hexagon 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.