{"id":5166,"date":"2026-09-18T09:49:14","date_gmt":"2026-09-18T09:49:14","guid":{"rendered":"https:\/\/www.henghuahose.com\/?post_type=product&p=5166"},"modified":"2026-09-18T09:49:15","modified_gmt":"2026-09-18T09:49:15","slug":"jic-male-74-degree-cone-jic-female-74-degree-seat-adapter-2j","status":"publish","type":"product","link":"https:\/\/www.henghuahose.com\/ar\/product\/jic-male-74-degree-cone-jic-female-74-degree-seat-adapter-2j\/","title":{"rendered":"2J Adapter – JIC Male 74\u00b0 Cone to JIC Female 74\u00b0 Seat Hydraulic Adapter (SAE J514)"},"content":{"rendered":"
The 2J adapter is a straight hydraulic adapter made to SAE J514 that carries a JIC male 74\u00b0 cone on one end and a JIC female 74\u00b0 seat on the other. It joins a male 74\u00b0 cone stud end at connection 1 to a male 74\u00b0 cone stud end at connection 2, because the female seat end receives the cone of the opposite stud.<\/p>\r\n\r\n\r\n\r\n
This is a male-to-female part, not a stud-to-stud part. Buyers choose it for one of two jobs: extending a stud out of an existing seat, or turning a male stud line into a fixed female seat. Both ends sit in the same 74\u00b0 family, yet the sealing surfaces are mirror images, and mixing them up is the most common ordering error here.<\/p>\r\n\r\n\r\n\r\n
Sealing principle of this series: both joints seal metal-to-metal on a 74\u00b0 cone, with no elastomer in the sealing path. The male end carries an external cone that seats on the internal cone of the mating seat, and the female end carries an internal seat that receives the cone of the opposite stud.<\/p>\r\n\r\n\r\n\r\n
Core Advantages<\/h2>\r\n\r\n\r\n\r\n
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Two functions in one part: a male 74\u00b0 cone stud at one end and a fixed 74\u00b0 female seat at the other.<\/li>\r\n\r\n\r\n\r\n
Straight body with a hex at each end, so either side can be held while the other is tightened.<\/li>\r\n\r\n\r\n\r\n
Equal-ended and reducing combinations in one series, from 7\/16″x20 up to 2.1\/2″x12.<\/li>\r\n\r\n\r\n\r\n
Metal-to-metal 74\u00b0 cone seal, with no elastomer in the joint to age or extrude.<\/li>\r\n\r\n\r\n\r\n
Carbon steel with trivalent chromium zinc plating, or 304 \/ 316 stainless steel for corrosive service.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
1. What a 2J Adapter Does<\/h2>\r\n\r\n\r\n\r\n
A 2J adapter is a straight body with a JIC male 74\u00b0 cone on one end and a JIC female 74\u00b0 seat on the other. It joins a male cone stud end at connection 1 to a male cone stud end at connection 2, so both sides belong to the SAE J514 74\u00b0 cone family and each seal is metal-to-metal.<\/p>\r\n\r\n\r\n\r\n
The part changes the gender of a 74\u00b0 connection so that a line can be extended or a seat can be created. Equal-ended versions such as 2J-08 carry the same thread at both ends; reducing versions such as 2J-08-12 carry a smaller thread at the male cone end and a larger thread at the female seat end, so the part also performs a size change.<\/p>\r\n\r\n\r\n\r\n
Why a male-to-female adapter is used.<\/strong> A male-to-male stud such as the 1J series joins two female seats. Where the circuit does not present two female seats, a male-to-female part is the correct function, in two common cases.<\/p>\r\n\r\n\r\n\r\n
The first case is extending a stud out of a seat. A stud that sits deep in a manifold seat, or that is shorter than the space the line has to cross, cannot be reached by the tube assembly. This adapter lands its male cone end on that existing seat and brings a new female seat out to the point where the tube assembly can be connected, held in line with the original seat.<\/p>\r\n\r\n\r\n\r\n
The second case is putting a fixed female seat onto a male stud. When a line already presents a male cone stud, a second stud cannot land on it. This adapter screws its female seat end onto that stud and presents a machined 74\u00b0 internal seat that a further male stud can enter. No swivel nut enters this sealing path.<\/p>\r\n\r\n\r\n\r\n
How the two ends differ even though both are 74\u00b0.<\/strong> Both ends are made to the same 74\u00b0 included angle, which is what makes them one family and lets either end seal against the standard 74\u00b0 counterpart. The difference is which side of the joint each end presents. Connection 1, the E end, is a male end carrying an external 74\u00b0 cone, a convex machined surface, and that cone is the sealing element. Connection 2, the F end, is a female end carrying an internal 74\u00b0 seat, a concave machined surface, plus an internal thread, and that seat is what the opposite part seals against. One end seals by being the cone, the other by receiving a cone, so a part identified as “74\u00b0” on the thread alone may still be the wrong gender for the port.<\/p>\r\n\r\n\r\n\r\n
2. 2J Specifications<\/h2>\r\n\r\n\r\n\r\n
2.1 Connection 1 – JIC male 74\u00b0 cone 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: 7\/16″x20 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, with an external 74\u00b0 cone.<\/li>\r\n\r\n\r\n\r\n
Sealing method: 74\u00b0 external cone seating metal-to-metal on the mating 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.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
2.2 Connection 2 – JIC female 74\u00b0 seat end (F)<\/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: 7\/16″x20 to 2.1\/2″x12. In a reducing row this end is the larger of the two threads printed.<\/li>\r\n\r\n\r\n\r\n
Gender: female end, with an internal 74\u00b0 seat and an internal thread.<\/li>\r\n\r\n\r\n\r\n
Sealing method: 74\u00b0 internal seat receiving the external cone of the opposite stud, sealing metal-to-metal.<\/li>\r\n\r\n\r\n\r\n
Mating port standard: SAE J514 male 74\u00b0 cone stud end at the same nominal size.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Both connections are on the same sealing family, so the only choice is which end goes onto the existing stud or seat, and the E and F columns answer that directly.<\/p>\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 a 2J adapter is machined from bar stock on CNC lathes, with the cone, the seat, the threads and both hexes turned in one setup so that the two ends stay concentric.<\/p>\r\n\r\n\r\n\r\n
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Body material: carbon steel as standard; 304 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.<\/li>\r\n\r\n\r\n\r\n
Seal material options: both joints of this series are metal-to-metal, so the adapter itself carries no elastomer. Where the same circuit uses elastomer-sealed components, NBR, FKM and EPDM are the available compounds.<\/li>\r\n\r\n\r\n\r\n
Machining process: bar-stock turning, thread form produced to the port standard, cone and seat checked against the drawing with gauges.<\/li>\r\n\r\n\r\n\r\n
Hex features: a hex on the male cone end (S1) and a hex on the female seat end (S2), from 12 mm to 65 mm across flats. 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 2J adapter is not set by the series code. It is governed by the thread size, the wall thickness of the body, 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 fact, not a performance claim. NBR seals work at approximately -30\u00b0C to +100\u00b0C, FKM (Viton-type) at approximately -20\u00b0C to +200\u00b0C, and EPDM at approximately -40\u00b0C to +120\u00b0C. Because the 74\u00b0 cone joints here are metal-to-metal, these figures apply to the elastomer-sealed components of the same circuit. Carbon steel with zinc plating suits general hydraulic service; specify 304 or 316 stainless steel for corrosive duty.<\/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 2J series. 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 prefix 2J<\/code>, then one size code for an equal-ended part or two codes for a reducing part.<\/li>\r\n\r\n\r\n\r\n
E<\/strong> – the thread of connection 1, the JIC male 74\u00b0 cone end, printed as diameter x threads per inch, for example 3\/4\"X16<\/code>.<\/li>\r\n\r\n\r\n\r\n
F<\/strong> – the thread of connection 2, the JIC female 74\u00b0 seat end. When E and F match, the part is equal-ended and only the gender differs.<\/li>\r\n\r\n\r\n\r\n
A<\/strong> \/ B<\/strong> – the length from each end to the hex face on that side, in millimetres; L<\/strong> is the overall length from the male cone end to the outer face of the female seat.<\/li>\r\n\r\n\r\n\r\n
S1<\/strong> \/ S2<\/strong> – the hex across flats on the male cone end and the female seat end, in millimetres.<\/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
The dash code is the size step, following the nominal tube outside diameter in sixteenths of an inch, so -04 is a 1\/4″ tube size. The printed thread for each equal-ended code is:<\/p>\r\n\r\n\r\n\r\n
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Size code<\/th>\r\n
Thread printed in this series<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
Nut and sleeve are ordered separately.<\/strong> The adapter is supplied as the body only. Use nut NB200 with sleeve NB500 for metric tube, and nut NB200 with sleeve NB300 for inch tube.<\/p>\r\n\r\n\r\n\r\n
3. How to Read a 2J Part Number<\/h2>\r\n\r\n\r\n\r\n
A 2J part number has three elements: the series prefix, one or two size codes, and no sealing suffix.<\/p>\r\n\r\n\r\n\r\n
The prefix 2J<\/code> identifies the family: a straight JIC adapter with a male 74\u00b0 cone at one end and a female 74\u00b0 seat at the other. A different prefix identifies a different geometry, such as a male-to-male stud, an elbow, a plug, or a cross standard adapter with an NPT or BSPT thread.<\/p>\r\n\r\n\r\n\r\n
The size code is the SAE dash size. One code means both ends are the same size, so the part changes gender only. Two codes separated by a dash mean the first is connection 1 (the E column, the male cone end) and the second is connection 2 (the F column, the female seat end), so the part is a reducer as well as a gender change.<\/p>\r\n\r\n\r\n\r\n
Worked example: 2J-08-12.<\/strong><\/p>\r\n\r\n\r\n\r\n
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2J<\/code> – straight JIC male 74\u00b0 cone to JIC female 74\u00b0 seat adapter, SAE J514.<\/li>\r\n\r\n\r\n\r\n
08<\/code> – connection 1 is the 3\/4″x16 male cone end.<\/li>\r\n\r\n\r\n\r\n
12<\/code> – connection 2 is the 1.1\/16″x12 female seat end.<\/li>\r\n\r\n\r\n\r\n
From the table: A is 16.7 mm, B is 15 mm, L is 39.5 mm, S1 is 27 mm and S2 is 32 mm.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
A buyer ordering 2J-08-12 receives an adapter whose male cone end lands on an existing 3\/4″x16 seat, while its female end presents a larger 1.1\/16″x12 seat, so one part both extends the stud and steps the line up a size.<\/p>\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 figure with HENGHUA engineering per order, and never use a pipe extension or an impact tool.<\/p>\r\n\r\n\r\n\r\n
Make up the female seat end first where its male stud is fixed to a port, because the body hex S2 can be held while that joint is set. Then bring the tube assembly to the male cone end and hold S1 while the nut is tightened.<\/p>\r\n\r\n\r\n\r\n
Keep the cone and the internal seat clean and free of nicks. JIC 74\u00b0 cone threads are not the sealing element, so do not use thread tape or sealant as a leak cure. Cap open ends before storage, because debris scores the faces and produces a seep. Bring the tube squarely to the adapter, because a tube pulled sideways loads the seat on one side. The body can be reused while both the cone and the seat are undamaged.<\/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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Landing the female seat end on a female seat. Symptom: the two internal seats face each other, so the thread will not start.<\/li>\r\n\r\n\r\n\r\n
Fitting the wrong dash size. Symptom: the nut will not start by hand, or starts and then bottoms out without contact on the cone.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Confirm the part number against the line list, and confirm which end in hand is the male cone and which is the female seat.<\/li>\r\n\r\n\r\n\r\n
Inspect the cone, the internal seat and the mating surfaces for nicks, corrosion and previous overtightening marks.<\/li>\r\n\r\n\r\n\r\n
Clean the cone, the seat and the threads with a lint-free cloth and a compatible cleaning fluid.<\/li>\r\n\r\n\r\n\r\n
Screw the female seat end onto its male stud by hand, hold S2 with a wrench and tighten that joint in stages.<\/li>\r\n\r\n\r\n\r\n
Fit the nut and sleeve to the tube, bring the tube square to the male cone end, then hold S1 and tighten the nut in stages.<\/li>\r\n\r\n\r\n\r\n
Pressurise the circuit, check both joints 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. The part is specified by its thread pair and gender combination rather than by industry.<\/p>\r\n\r\n\r\n\r\n
Extending a stud out of a manifold seat.<\/strong> Where a manifold presents a recessed 74\u00b0 seat, or the stud on the equipment is too short for the route the tube has to take, the male cone end of this adapter lands on that seat and carries a new female seat out to the tube assembly. The extension stays concentric with the original seat, so the tube does not have to be re-bent.<\/p>\r\n\r\n\r\n\r\n
Putting a fixed female seat on a male stud.<\/strong> An equipment port or a welded boss can present a male 74\u00b0 cone stud. The female seat end is screwed onto that stud and the tube assembly is then made up to the new seat. Because the seat is machined into the body instead of being carried by a swivel nut, no extra swivel joint enters the sealing path.<\/p>\r\n\r\n\r\n\r\n
Repair and replacement.<\/strong> Maintenance crews fit a 2J adapter when a damaged tube end, a seized stud or a stripped seat has to be resolved on site, and the printed range usually covers the replacement from stock.<\/p>\r\n\r\n\r\n\r\n
Test benches and OEM lines.<\/strong> Test rigs need repeatable interfaces between the pump, the gauge line and the test article, and these cone joints hold a stable seal across thermal cycles; for production lines the series is supplied to a drawing-based specification fixed per programme.<\/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 adapters interchange only if the standard, thread size, seat angle, gender at each end and seal type all match.<\/p>\r\n\r\n\r\n\r\n
This series is a SAE J514 straight adapter with a male 74\u00b0 cone at connection 1 and a female 74\u00b0 seat at connection 2. 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. It is also not interchangeable with an ORFS fitting under SAE J1453, with an SAE O-ring boss stud end under SAE J1926-3, or with an NPT fitting, which seals on the thread flanks under ANSI\/ASME B1.20.1 and needs a sealant.<\/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 and the pitch on both ends, and note which end has the external thread and which has the internal thread. A 3\/4″ end measures about 19.0 mm outside diameter with 16 threads per inch; a 1.1\/16″ end measures about 27.0 mm with 12 threads per inch. Record diameter, pitch and gender together.<\/li>\r\n\r\n\r\n\r\n
Seat angle.<\/strong> Use a seat angle gauge or a straight edge against the cone or the seat. A 74\u00b0 cone is wide and shallow; a 37\u00b0 flare is narrower and steeper. If the angles differ, the parts do not interchange regardless of thread match.<\/li>\r\n\r\n\r\n\r\n
Gender and seal type.<\/strong> Confirm whether each end is a male cone or a female seat, and whether the joint relies on a metal cone, an elastomeric O-ring or the thread itself. A 74\u00b0 cone joint has no O-ring in its sealing path, and a seat cannot seal against another seat.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n
Where the port standard is not SAE J514, a cross standard adapter of the same size is the correct part. Record the three measurements with the part number, and HENGHUA can match the replacement to the series and size code in table 2.5.<\/p>\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: 2J<\/code>.<\/li>\r\n\r\n\r\n\r\n
Full part number, for example 2J-08-12, 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, and state which end must be the male cone and which the female seat.<\/li>\r\n\r\n\r\n\r\n
Nut and sleeve requirement, 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.<\/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 Cr3+ zinc plating, zinc-nickel plating, or 304 \/ 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 and the quantity.<\/p>\r\n\r\n\r\n\r\n
Sample orders and first-article parts are available for OEM programmes, including specials where the printed table does not cover the required combination. Lead time is confirmed per order, because it depends on the size, the material, the plating and the quantity. As a hydraulic adapter manufacturer and hydraulic adapter supplier, HENGHUA can quote the adapter, 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 2J series is on the JIC 74\u00b0 cone side, so confirm the seat angle first.<\/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, angle and pitch differ, so the two will not seal even though some sizes start by hand. Order a cross standard adapter when the two sides differ.<\/p>\r\n\r\n\r\n\r\n
How do I identify the correct 2J size?<\/strong><\/p>\r\n\r\n\r\n\r\n
Measure the thread outside diameter and the pitch on both mating interfaces, and note the gender of each: a male cone stud is met by the female seat end of this series, and a female seat by the male cone end. Then read across the E and F columns of table 2.5. When thread, seat angle and gender all match a printed row, that row is the correct part number.<\/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 and water-glycol, EPDM is the option, at approximately -40\u00b0C to +120\u00b0C. Both joints here are metal-to-metal, so the seal material applies to the elastomer-sealed parts of the 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, and is confirmed per order by HENGHUA engineering 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
Why not use a male-to-male stud instead of a 2J adapter?<\/strong><\/p>\r\n\r\n\r\n\r\n
A male-to-male stud joins two female 74\u00b0 seats and cannot land on a male stud. The 2J adapter is chosen when one side of the circuit presents a male cone stud that has to be extended or converted, because its female seat end can receive that stud and its male cone end then presents a standard stud interface to the next connection.<\/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 required gender at each end, the nut and sleeve requirement, the material and plating, and the quantity. HENGHUA confirms the match to the printed table, the seal and material options and the delivery schedule, and quotes the 2J adapter that fits your circuit.<\/p>\r\n\r\n\r\n\r\n
![\"2J](\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/09\/jic-male-74-degree-cone-jic-female-74-degree-seat-adapter-2j-dimensions.png\")
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