{"id":5120,"date":"2026-09-19T01:18:31","date_gmt":"2026-09-19T01:18:31","guid":{"rendered":"https:\/\/www.henghuahose.com\/?post_type=product&p=5120"},"modified":"2026-09-19T01:18:33","modified_gmt":"2026-09-19T01:18:33","slug":"90-degree-elbow-jic-male-74-degree-cone-npt-male-adapter-1jn9","status":"publish","type":"product","link":"https:\/\/www.henghuahose.com\/ru\/product\/90-degree-elbow-jic-male-74-degree-cone-npt-male-adapter-1jn9\/","title":{"rendered":"1JN9 Adapter – 90\u00b0 Elbow JIC Male 74\u00b0 Cone to NPT Male Hydraulic Adapter (SAE J514)"},"content":{"rendered":"
The 1JN9 adapter is a 90\u00b0 elbow hydraulic adapter that joins a JIC 74\u00b0 cone male end to an NPT male end, so a 74\u00b0 cone tube connection can be turned through a right angle and adapted to a taper pipe port. The JIC end is machined to SAE J514 and the pipe end to ANSI\/ASME B1.20.1, and the part is supplied as the elbow body, with the nut and sleeve for the tube ordered separately.<\/p>\r\n\r\n\r\n\r\n
Both connection ends must match their mating port exactly, in thread form, thread size and sealing method, because that exact match is the precondition for eliminating leakage at the conversion point. The 1JN9 adapter carries two different sealing principles at its two ends, and each one is prepared differently during assembly.<\/p>\r\n\r\n\r\n\r\n
Sealing principle of this series: the JIC end seals metal-to-metal on a 74\u00b0 external cone that seats on the mating 74\u00b0 internal cone, while the NPT end is a 60\u00b0 taper pipe thread and seals on the thread flanks, so it needs a compatible thread sealant. No elastomer sits in either sealing path.<\/p>\r\n\r\n\r\n\r\n
Core Advantages<\/h2>\r\n\r\n\r\n\r\n
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90\u00b0 elbow body, so the line turns a right angle at the port instead of being bent into place.<\/li>\r\n\r\n\r\n\r\n
Combines two jobs in one part: a 74\u00b0 cone tube connection and an NPT taper pipe conversion.<\/li>\r\n\r\n\r\n\r\n
Broad reducing range from 5\/16″x24 by Z1\/8″x27 up to 2.1\/2″x12 by Z2″x11.5, all in one series.<\/li>\r\n\r\n\r\n\r\n
Metal-to-metal 74\u00b0 cone seat at the JIC end, with no elastomer to age, swell or extrude.<\/li>\r\n\r\n\r\n\r\n
Carbon steel with trivalent chromium zinc plating; 304 or 316 stainless steel for corrosive service.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
1. What a 1JN9 Adapter Does<\/h2>\r\n\r\n\r\n\r\n
A 1JN9 adapter is a 90\u00b0 elbow male adapter with two different male ends. The first leg, marked E on the drawing, is a JIC 74\u00b0 cone male stud end made to SAE J514. The second leg, marked F, is an NPT male taper pipe thread made to ANSI\/ASME B1.20.1. The part therefore turns the flow path through 90\u00b0 and changes the connection standard at the same time.<\/p>\r\n\r\n\r\n\r\n
Because the part is an elbow, the two thread axes are at 90\u00b0 to each other. One axis runs into the equipment port and the other axis runs along the tube or hose. The hex S1 sits between them, so the body can be held with a wrench while the tube nut is run up on the cone end and while the taper pipe end is made up into its port.<\/p>\r\n\r\n\r\n\r\n
Why an elbow is chosen over a straight stud.<\/strong> A straight stud keeps the flow path axial, which is the lowest-loss option, but it forces the line to take the 90\u00b0 turn somewhere else. With a straight stud the turn has to be made by a bent tube, a formed hose, or a second elbow fitted downstream. Each of those options adds a part, adds a joint and consumes space that a machine envelope may not have. A 90\u00b0 elbow hydraulic adapter makes the turn at the port itself, so the tube can leave the port parallel to the manifold face, and the assembly needs one fewer connection.<\/p>\r\n\r\n\r\n\r\n
2. 1JN9 Specifications<\/h2>\r\n\r\n\r\n\r\n
2.1 Connection 1 – JIC 74\u00b0 cone male end (E)<\/h3>\r\n\r\n\r\n\r\n
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Thread standard and family: SAE J514, JIC 74\u00b0 cone seat family.<\/li>\r\n\r\n\r\n\r\n
Thread size range available: 5\/16″x24 to 2.1\/2″x12, in the steps printed in table 2.5.<\/li>\r\n\r\n\r\n\r\n
Gender: male stud end.<\/li>\r\n\r\n\r\n\r\n
Sealing method: 74\u00b0 external cone seating metal-to-metal on the mating 74\u00b0 internal cone.<\/li>\r\n\r\n\r\n\r\n
Mating port standard: SAE J514 74\u00b0 cone seat, made up with the matching nut and sleeve for the tube.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
2.2 Connection 2 – NPT male end (F)<\/h3>\r\n\r\n\r\n\r\n
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Thread standard and family: ANSI\/ASME B1.20.1, general purpose taper pipe thread (NPT). Dryseal forms to SAE J476 are used where a pressure-tight joint is made on the threads.<\/li>\r\n\r\n\r\n\r\n
Thread size range available: Z1\/8″x27 to Z2″x11.5, in the steps printed in table 2.5.<\/li>\r\n\r\n\r\n\r\n
Gender: male taper pipe thread.<\/li>\r\n\r\n\r\n\r\n
Sealing method: metal-to-metal contact on the thread flanks as the taper is made up, with a compatible thread sealant applied to the male thread.<\/li>\r\n\r\n\r\n\r\n
Mating port standard: ANSI\/ASME B1.20.1 taper pipe port, or a port with a matching NPT taper pipe thread.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
2.3 Construction and Materials<\/h3>\r\n\r\n\r\n\r\n
The body of this elbow hydraulic adapter, a JIC male adapter, is machined from bar stock on CNC lathes. The 74\u00b0 cone, the cone-end thread, the taper pipe thread and the hex are turned in one setup so that the two legs stay square to each other and the cone stays concentric with its thread.<\/p>\r\n\r\n\r\n\r\n
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Body material: carbon steel as standard; 304 stainless steel or 316 stainless steel on request; brass for selected sizes.<\/li>\r\n\r\n\r\n\r\n
Plating and finish: trivalent chromium zinc plating (Cr3+) for carbon steel as standard; zinc-nickel plating available. Plating thickness and corrosion performance are confirmed per order rather than published as a series figure.<\/li>\r\n\r\n\r\n\r\n
Seal material options: the 74\u00b0 cone joint is metal-to-metal and the NPT joint seals on the threads, so the 1JN9 adapter itself carries no elastomer. Where the same circuit uses elastomer-sealed components, NBR, FKM and EPDM are the available seal compounds.<\/li>\r\n\r\n\r\n\r\n
Machining process: bar-stock turning, thread forms produced to the port standards named in 2.1 and 2.2, cone and taper checked against the drawing.<\/li>\r\n\r\n\r\n\r\n
Hex feature: a single centre hex (S1) on the body, from 11 mm to 63 mm across flats depending on size. There is no bulkhead feature in this series.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
2.4 Pressure and Temperature<\/h3>\r\n\r\n\r\n\r\n
Working pressure for a 1JN9 adapter is not set by the series code. It is governed by the thread size, the wall thickness of the body and the tube, the sealing method and the material selected. Working pressure for these sizes is confirmed per order by HENGHUA engineering, based on the thread size, sealing method and material selected.<\/p>\r\n\r\n\r\n\r\n
Temperature is a material question and is stated here as a material fact rather than a performance claim. For NBR seals, the working range is approximately -30\u00b0C to +100\u00b0C. For FKM (Viton-type) seals, it is approximately -20\u00b0C to +200\u00b0C. For EPDM seals, it is approximately -40\u00b0C to +120\u00b0C. These figures apply to the elastomer, and therefore to the elastomer-sealed components in a circuit rather than to the metal cone and thread joints of this series.<\/p>\r\n\r\n\r\n\r\n
2.5 Part Number and Dimension Table<\/h3>\r\n\r\n\r\n\r\n
The table below is the complete printed size range of the 1JN9 series. All length and hex dimensions are in millimetres.<\/p>\r\n\r\n\r\n\r\n
What each column means<\/strong><\/p>\r\n\r\n\r\n\r\n
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PART NO.<\/strong> – the HENGHUA part number. The series prefix 1JN9<\/code> is followed by one size code for a single JIC size, or by two size codes separated by a dash when the JIC end and the NPT end are different sizes.<\/li>\r\n\r\n\r\n\r\n
E<\/strong> – the thread of connection 1, the JIC 74\u00b0 cone end, printed as diameter x threads per inch in the SAE style, for example 9\/16\"X18<\/code>.<\/li>\r\n\r\n\r\n\r\n
F<\/strong> – the thread of connection 2, the NPT male end, printed with the taper pipe designation Z<\/code> and the diameter x threads per inch notation, for example Z3\/8\"X18<\/code>.<\/li>\r\n\r\n\r\n\r\n
A<\/strong> – the leg dimension printed for connection 1 (the JIC cone leg), in millimetres, as marked on the series drawing.<\/li>\r\n\r\n\r\n\r\n
B<\/strong> – the leg dimension printed for connection 2 (the NPT leg), in millimetres, on the same basis.<\/li>\r\n\r\n\r\n\r\n
S1<\/strong> – the hex across flats, in millimetres, used to hold the elbow body with a wrench during assembly.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Thread size and dash chart<\/strong><\/p>\r\n\r\n\r\n\r\n
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Size code<\/th>\r\n
JIC thread printed in this series<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
3. How to Read a 1JN9 Part Number<\/h2>\r\n\r\n\r\n\r\n
A 1JN9 part number has three elements: the series prefix and one or two size codes, and no sealing suffix on this series.<\/p>\r\n\r\n\r\n\r\n
The prefix 1JN9<\/code> identifies the geometry: a 90\u00b0 elbow with a JIC 74\u00b0 cone male end and an NPT male end. The 9<\/code> in the prefix marks the 90\u00b0 elbow form in this catalogue family; a 4<\/code> in the same position marks the 45\u00b0 elbow form, and no digit at all marks the straight stud form. The letters JN<\/code> mark the combination of a JIC cone end and an NPT pipe end, and the letter N<\/code> inside the F column mark means the thread is a taper pipe thread.<\/p>\r\n\r\n\r\n\r\n
The size code is the SAE dash size of the JIC end. One code means the NPT end is the standard pairing for that JIC size. Two codes separated by a dash mean the first code is the JIC end and the second code is the NPT end, which makes the part a reducer between the two families.<\/p>\r\n\r\n\r\n\r\n
Worked example: 1JN9-08-06.<\/strong><\/p>\r\n\r\n\r\n\r\n
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1JN9<\/code> – 90\u00b0 elbow, JIC 74\u00b0 cone male end to NPT male end.<\/li>\r\n\r\n\r\n\r\n
08<\/code> – connection 1, the JIC end, is the 3\/4″x16 size.<\/li>\r\n\r\n\r\n\r\n
06<\/code> – connection 2, the NPT end, is the Z3\/8″x18 size.<\/li>\r\n\r\n\r\n\r\n
From the table: A is 32 mm, B is 31 mm and S1 is 19 mm.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
4. Installation and Fitment<\/h2>\r\n\r\n\r\n\r\n
A 74\u00b0 cone joint is assembled by hand first and then tightened to seat the cone. HENGHUA does not print a single torque figure for the series, because the correct tightening depends on the nut and sleeve fitted, the tube material and the wall thickness. Follow the nut supplier’s recommendation, or confirm the tightening figure with HENGHUA engineering per order. Bring the nut up by hand until it is snug against the cone, then tighten in stages, and never use a pipe extension or an impact tool on a cone joint.<\/p>\r\n\r\n\r\n\r\n
Taper pipe end: an NPT joint seals on the thread flanks under ANSI\/ASME B1.20.1, so the male thread needs a compatible thread sealant applied to the first few threads. Run the pipe end in by hand to check that it starts squarely, then tighten it until it is seated. Never back the pipe end out to adjust the elbow orientation, because a taper thread that has been backed off will weep along the thread. Set the orientation in one pass, with the sealant applied, and stop with the elbow leg pointing where the tube run needs it.<\/p>\r\n\r\n\r\n\r\n
Cone seat handling: keep both the stud cone and the mating female cone clean and free of nicks. Wipe the cone with a lint-free cloth and inspect it under good light before assembly. A cone that has been overtightened is already deformed and must be replaced.<\/p>\r\n\r\n\r\n\r\n
Contamination control: cap open ends before storage and before the line goes back into service, because debris that reaches the cone seat scores the faces and produces a seep that no further tightening removes.<\/p>\r\n\r\n\r\n\r\n
Alignment: bring the tube squarely to the JIC end before starting the nut, because a tube pulled sideways into the cone loads the seat on one side and weeps at first pressure. On an elbow body, the correct sequence is to seat the pipe end first and then make up the cone end, so the tube line is not loaded while the body is being rotated.<\/p>\r\n\r\n\r\n\r\n
Reuse policy: the elbow body with an undamaged cone and clean pipe thread can be reused. The nut and sleeve are the wear items, and the assembly is replaced whenever a cone shows galling or a bright polished band.<\/p>\r\n\r\n\r\n\r\n
Common fitment errors and their symptoms:<\/p>\r\n\r\n\r\n\r\n
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Mixing a 37\u00b0 flare with a 74\u00b0 cone seat. Symptom: the nut runs up but the joint weeps at first pressure, and the two seat angles are visibly different under inspection.<\/li>\r\n\r\n\r\n\r\n
Forcing a BSPT male into an NPT port, or the reverse. Symptom: the thread starts by hand at some sizes and then binds, and the joint weeps because the thread forms and the 55\u00b0 or 60\u00b0 flank angles differ.<\/li>\r\n\r\n\r\n\r\n
Overtightening the cone end to stop a seep. Symptom: a deformed cone and a leak that returns immediately.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Confirm the part number against the line list, and check that the JIC thread and the NPT thread each match their mating port.<\/li>\r\n\r\n\r\n\r\n
Inspect the cone and the mating seat for nicks, corrosion and previous overtightening marks, and inspect the pipe thread for damage.<\/li>\r\n\r\n\r\n\r\n
Clean the cone and the threads with a lint-free cloth and a compatible cleaning fluid.<\/li>\r\n\r\n\r\n\r\n
Apply thread sealant to the NPT male thread, run the pipe end in by hand, then tighten it in one pass with the elbow leg aligned to the run.<\/li>\r\n\r\n\r\n\r\n
Fit the nut and sleeve to the tube, bring the tube square to the JIC end by hand, then tighten the nut in stages to the recommended figure without an extension bar.<\/li>\r\n\r\n\r\n\r\n
Pressurise the circuit, check both ends for weeping, and re-check the tightness after the first thermal cycle.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n
5. Applications and Industries<\/h2>\r\n\r\n\r\n\r\n
Application tags for this series: hydraulic systems, water jetting, oil and gas, industrial equipment, construction machinery, agriculture, marine, material handling. A fitting in this series is specified by its thread pair rather than by industry, so the same part serves several of these sectors.<\/p>\r\n\r\n\r\n\r\n
Cross-standard equipment integration.<\/strong> Equipment built around SAE J514 tube connections often has to tie into pipe-ported components such as valves, filters and cylinders. The 1JN9 adapter does both jobs at once: it provides the 74\u00b0 cone interface on the tube side and the ANSI\/ASME B1.20.1 taper pipe interface on the port side, and the 90\u00b0 body turns the line inside the available envelope. A cross standard adapter is the correct part when the port follows another standard.<\/p>\r\n\r\n\r\n\r\n
High-pressure test benches.<\/strong> Test rigs need repeatable, replaceable interfaces between the pump side, the gauge line and the test article. The metal-to-metal cone joint gives a stable seal across thermal cycles, the taper pipe end seals without an O-ring, and the centre hex holds the body while the tube nut is tightened.<\/p>\r\n\r\n\r\n\r\n
OEM assembly lines.<\/strong> For production lines, this series is supplied to a drawing-based specification with the plating and material fixed per programme, and packed for line-side delivery to the correct station.<\/p>\r\n\r\n\r\n\r\n
6. Replacement and Cross-Reference Guide<\/h2>\r\n\r\n\r\n\r\n
Cross-reference for this series is organised by standard and sealing method, never by brand. Two hydraulic fittings interchange only if the standard, the thread size, the seat angle and the seal type all match.<\/p>\r\n\r\n\r\n\r\n
A 1JN9 adapter is a SAE J514 74\u00b0 cone male adapter combined with an ANSI\/ASME B1.20.1 NPT male end on a 90\u00b0 elbow body. It is not interchangeable with a JIC 37\u00b0 flare fitting: a 37\u00b0 flare seals on the conical flare face while a 74\u00b0 cone seals on the wide cone face, and the two seats will not mate even when the thread appears to match. It is not interchangeable with an ORFS fitting, which seals a flat face against an elastomeric O-ring under SAE J1453. It is also not interchangeable with a BSPT fitting, which is a 55\u00b0 taper pipe thread under ISO 7-1, whereas the pipe end of this series is a 60\u00b0 NPT thread under ANSI\/ASME B1.20.1.<\/p>\r\n\r\n\r\n\r\n
To identify the correct replacement, measure three things.<\/p>\r\n\r\n\r\n\r\n
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Thread.<\/strong> Measure the outside diameter of each thread and the pitch. A 3\/4″ JIC end measures about 19.0 mm outside diameter with 16 threads per inch; a Z3\/8″ pipe end measures about 17.1 mm with 18 threads per inch. Record diameter and pitch together, because the same diameter can appear with a different pitch in another family.<\/li>\r\n\r\n\r\n\r\n
Seat angle.<\/strong> Use a seat angle gauge or a straight edge against the cone. A 74\u00b0 cone is a wide, shallow cone; a 37\u00b0 flare is a narrow, steeper flare. If the angles differ, the parts do not interchange regardless of thread match.<\/li>\r\n\r\n\r\n\r\n
Seal type.<\/strong> Confirm whether each end relies on a metal cone, an elastomer O-ring or the thread itself. On this series the cone end is metal-to-metal and the pipe end seals on the threads; if the part in your hand has a captive O-ring or a flat face groove, it belongs to a different family. Order a cross standard adapter rather than forcing the thread.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n
7. Ordering, Packaging and Delivery<\/h2>\r\n\r\n\r\n\r\n
To order, give the following information:<\/p>\r\n\r\n\r\n\r\n
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Series code: 1JN9<\/code>.<\/li>\r\n\r\n\r\n\r\n
Full part number, for example 1JN9-08-06, taken from table 2.5.<\/li>\r\n\r\n\r\n\r\n
Thread sizes for connection 1 and connection 2, read from the E and F columns.<\/li>\r\n\r\n\r\n\r\n
Nut and sleeve requirement for the JIC end, including the tube standard (metric tube uses nut NB200 with sleeve NB500; inch tube uses nut NB200 with sleeve NB300), because these are ordered separately from the body.<\/li>\r\n\r\n\r\n\r\n
Seal material for the elastomer-sealed components in the circuit: NBR, FKM or EPDM.<\/li>\r\n\r\n\r\n\r\n
Body material and plating: carbon steel with trivalent chromium zinc plating, zinc-nickel plating, or 304 or 316 stainless steel.<\/li>\r\n\r\n\r\n\r\n
Quantity, and the destination and packing format required.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Packaging formats: bulk cartons for line-side consumption, small boxes for distributor shelves and labelled bags for service kits, each labelled with the part number, the thread sizes and the quantity.<\/p>\r\n\r\n\r\n\r\n
Sample orders: validation samples and first-article parts are available for OEM programmes, including drawing-based manufacture of specials where the printed table does not cover the required combination.<\/p>\r\n\r\n\r\n\r\n
Lead time is confirmed per order, because it depends on the size, the material, the plating and the quantity. Send the requirement with the quantity and the required date, and HENGHUA confirms the schedule with the quotation. As a hydraulic adapter manufacturer and hydraulic adapter supplier, HENGHUA can quote the body, the nut and the sleeve as one matched kit.<\/p>\r\n\r\n\r\n\r\n
8. FAQ<\/h2>\r\n\r\n\r\n\r\n
What is the difference between JIC 37\u00b0 flare and ORFS, and which should I use?<\/strong><\/p>\r\n\r\n\r\n\r\n
A JIC 37\u00b0 flare joint seals metal-to-metal on a 37\u00b0 conical flare face under SAE J514. An ORFS joint seals a flat face against an elastomeric O-ring under SAE J1453. Choose the family that matches the port already on the equipment, because the two are not interchangeable. The 1JN9 adapter is on the JIC 74\u00b0 cone side of SAE J514 at its first end, so confirm the seat angle before ordering.<\/p>\r\n\r\n\r\n\r\n
Can NPT and BSPT be interchanged?<\/strong><\/p>\r\n\r\n\r\n\r\n
No. NPT is a 60\u00b0 taper pipe thread under ANSI\/ASME B1.20.1, and BSPT is a 55\u00b0 taper pipe thread under ISO 7-1. The thread form, the flank angle and the pitch differ, so the two will not seal even though some sizes start by hand. Use the thread that the port is machined to, and order a cross standard adapter when the two sides differ, rather than forcing a mismatched pipe thread. The pipe end of this series is NPT, made to ANSI\/ASME B1.20.1.<\/p>\r\n\r\n\r\n\r\n
How do I identify the correct 1JN9 size?<\/strong><\/p>\r\n\r\n\r\n\r\n
Measure the thread outside diameter and the pitch on both mating ports, then read across the E and F columns of table 2.5 for that thread pair. When the JIC thread, the cone angle and the pipe thread all match a printed row, that row is the correct part number. Remember that A refers to the JIC leg and B to the NPT leg.<\/p>\r\n\r\n\r\n\r\n
What seal material should I select for my fluid and temperature?<\/strong><\/p>\r\n\r\n\r\n\r\n
For general mineral hydraulic oil within -30\u00b0C to +100\u00b0C, NBR is the usual choice. For higher temperatures up to approximately +200\u00b0C, or where the fluid attacks NBR, choose FKM (Viton-type). For water, water-glycol and many water-based fluids, EPDM is the option, with a working range of approximately -40\u00b0C to +120\u00b0C. Both joints in this series are metal joints, so the seal material applies to the elastomer-sealed parts of the same circuit.<\/p>\r\n\r\n\r\n\r\n
How is the working pressure of this adapter determined?<\/strong><\/p>\r\n\r\n\r\n\r\n
Working pressure is not fixed by the series code. It is governed by the thread size, the wall thickness of the body and the tube, the sealing method and the material selected. Working pressure for these sizes is confirmed per order by HENGHUA engineering, based on the thread size, sealing method and material selected, against the intended circuit.<\/p>\r\n\r\n\r\n\r\n
What is the minimum order quantity and can I get samples?<\/strong><\/p>\r\n\r\n\r\n\r\n
Minimum order quantity depends on the size code, the material and the plating, so it is confirmed with the quotation rather than published as one series figure. Samples and validation parts are available for OEM and distributor evaluation, including specials made to a drawing.<\/p>\r\n\r\n\r\n\r\n
Send your requirement to HENGHUA<\/strong><\/p>\r\n\r\n\r\n\r\n
Send the part number, the two thread sizes, the nut and sleeve requirement, the material and plating, and the quantity. HENGHUA confirms the match to the printed table, the seal options and the delivery schedule, and quotes the 1JN9 adapter that fits your circuit.<\/p>\r\n\r\n\r\n\r\n
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