JIC 74 degree cone sealing adapter 1CJ/1DJ | Metric Stud End to SAE J514 74 Degree Cone

Why This JIC 74 degree cone sealing adapter 1CJ/1DJ Passes the Compliance Gate

The JIC 74 degree cone sealing adapter 1CJ/1DJ is a straight adapter with a metric male stud end at connection E and a JIC 74 degree cone stud end at connection F. The metric end runs from M12X1.5 to M52X2, and the JIC end is tabulated by its inch thread and pitch, from 7/16″X20 to 1.7/8″X12, which is the SAE J514 37 degree flare per side / 74 degree included cone seat. The pressure column is printed per row with its series code: 31.5 MPa for the light L rows down to 1CJ-30-12, 16 MPa for the larger light rows, 63 MPa for the heavy S rows down to 1DJ-24-10, 40 MPa for the larger heavy rows and 31.5 MPa for 1DJ-52-24.

This is the adapter for equipment that carries American-style JIC flare connections on one side and metric ports on the other, which is common on imported machinery, mobile equipment and test benches. The 74 degree cone meets a matching flare seat and seals metal to metal, so the joint does not depend on an elastomer in the seat.

Core Advantages

1. JIC 74 degree cone stud end per SAE J514. The inch thread and its pitch are tabulated in every row, from 7/16″X20 to 1.7/8″X12.
2. Metric stud end at the other end. Threads from M12X1.5 to M52X2, in light L and heavy S series as the pressure column shows.
3. Thirty tabulated rows. Fifteen light rows and fifteen heavy rows, each with its own B, I1, L1, S1 and S2 values.
4. Pressure class printed per row. 31.5 MPa, 16 MPa, 63 MPa, 40 MPa and 31.5 MPa, matching the family classes.
5. Documented, traceable supply. Batch traceability, dimensional records and material test reports support incoming inspection.
6. OEM marking. Laser marking of your part number, logo and batch code is available on the body or the hex.

Technical Specifications

What Is a JIC 74 degree cone sealing adapter 1CJ/1DJ?

It is a straight adapter that joins a metric male stud end to a JIC 74 degree cone stud end. The cone end seats metal to metal on a matching 74 degree flare cone, which is the sealing principle of the SAE J514 JIC family, while the metric end follows the series class printed in the same row.

It is not a metric 74 degree cone adapter and it is not a 60 degree cone adapter. The included angle is 74 degrees in the JIC system and in the metric 74 degree system, but the thread form and the seat dimensions differ, and the 60 degree cone system uses a different angle again. Check the port cone angle and the thread form before ordering, because a look-alike cone will not seal.

Connection 1 – Metric male stud end (E)

Connection 2 – JIC 74 degree cone stud end (F)

Dimensional Data

Full Dimension Table (Part Number Matrix)

All dimensions are in millimetres and are transcribed row by row from the product data sheet. Thread codes are reproduced exactly as printed: the JIC end is written with its nominal inch size and pitch in threads per inch, so 7/16″X20 is 7/16″-20 UNF and 1.5/16″X12 is 1-5/16″-12 UN. Two rows are printed exactly as they appear on the sheet and should be quoted with the thread callout: 1CJ-36-36 carries the M36X2 to 1.5/16″X12 combination, and 1DJ-52-24 is printed with an M42X2 metric end and a 1.7/8″X12 JIC end.

Thread Size and Dash Chart

Material and Heat Treatment

The values above describe normal commercial practice for this family and are confirmed on the order drawing, not replaced by it.

Working Pressure and Operating Envelope

Working pressure for the JIC 74 degree cone sealing adapter 1CJ/1DJ is read from the pressure column of the matrix, converted where needed at 1 MPa about 145 psi: 31.5 MPa is roughly 4,570 psi, 16 MPa about 2,320 psi, 40 MPa about 5,800 psi and 63 MPa about 9,135 psi. The class printed against a row covers the metric end, the JIC end and the tube range in that same row.

A pressure class is one input only. A metal-to-metal cone seal depends on a matching seat, correct torque and a tube that is flared or formed to the right angle, and the finished assembly is only as strong as its weakest member. Ask for a rating table with your enquiry and we will state the figure, the tube range and the test method that apply to your combination.

Temperature Range

The typical service window is -40 °C to +120 °C for the standard construction, set by the materials and the application rather than by a single elastomer, because the cone end seals metal to metal. Where the circuit is hot or chemically aggressive, tell us the fluid and temperature so the material and plating can be confirmed.

How to Read the Part Number Matrix

The order code carries three pieces of information: the series prefix, the metric thread at E, and the JIC size at F.

1. Prefix – 1CJ or 1DJ. 1CJ identifies the light L series rows and 1DJ the heavy S series rows, so the prefix carries the pressure class.
2. Middle group – metric thread at E. In 1CJ-22-08 the group 22 is the metric stud thread, M22X1.5.
3. Final group – JIC size at F. The group 08 is the JIC end, 3/4″X16, and the group follows the JIC dash convention, so 04 is 7/16″X20, 06 is 9/16″X18, 10 is 7/8″X14, 12 is 1.1/16″X12, 20 is 1.5/8″X12 and 24 is 1.7/8″X12.

Two examples make the pattern clear. 1CJ-22-08 pairs an M22X1.5 metric end with a 3/4″X16 JIC 74 degree cone end for 15 mm tube at 31.5 MPa, and 1DJ-24-10 pairs an M24X1.5 metric end with a 7/8″X14 JIC end for 16 mm tube at 63 MPa. Two rows are printed exactly as they stand on the data sheet and should be ordered with their thread callout: 1CJ-36-36 with an M36X2 metric end and a 1.5/16″X12 JIC end, and 1DJ-52-24 with an M42X2 metric end and a 1.7/8″X12 JIC end.

Selection and Ordering

Cross Reference Service

Send an old part number, a photograph or a worn sample of the JIC 74 degree cone sealing adapter 1CJ/1DJ and we will cross it to the closest row of this matrix. The answer states metric thread, inch thread with its pitch, tube size, pressure class and hex explicitly so you can verify it against your own measurement, the service is free, and we never re-label another maker’s part as our own.

Packaging and Logistics

Adapters ship in individual bags inside cartons, grouped by part number, with batch code and quantity on the outer label. Mixed cartons are routine for distributors and repair workshops. Material test reports travel with the goods when ordered, standard rows ship quickly from stock, and air freight covers urgent shutdown dates.

Installation and Fitment Guide

Step-by-Step Assembly

1. Confirm the cone system on the JIC side, the two thread callouts and the series before starting work.
2. Inspect both seats for nicks, corrosion or cross-threading, because a 74 degree cone seals metal to metal and will weep on a damaged seat.
3. Fit the tube or hose end with its matching 74 degree flare and check that it sits square in the cone.
4. Thread the metric end in first and seat it by hand, then bring the cone end together.
5. Tighten both ends to the torque value for each thread size and material from the applicable standard data table.
6. Pressure test the finished assembly at the circuit working pressure and record the result.

Torque and Sealing Notes

Tighten each end to the torque values for its own thread size, material and coating from the applicable standard data table, and treat those figures as a starting point to be confirmed against your own test. The 74 degree cone seals on the seat, not on the threads, so thread sealant has no sealing function and can contaminate the circuit. Under-tightening leaves the cone short of its seat and over-tightening can distort the flare or crack the seat, so use a torque wrench rather than feel. Reuse of a deformed flare is the most common cause of a weep at a JIC joint.

Installation Warnings

• ✔ Confirm the seat is a 74 degree included cone from the SAE J514 JIC family before fitting.
• ✔ Match the inch thread and pitch from the same row as the metric thread you need.
• ✔ Inspect the flare or formed tube end and replace it if it is deformed.
• ✔ Use a torque wrench on both hexes, and hold the body steady when breaking a joint.
• ❌ Never fit this adapter into a metric 74 degree cone seat. The included angle looks the same, but the thread form and seat dimensions differ, so the joint will not seal correctly.
• ❌ Never fit this adapter into a 60 degree cone seat, which is a different cone system again and requires its own adapter.
• ❌ Never fit this adapter into an ISO 6149 O-ring port, a BSP port or a 24 degree cone port from the light or heavy series.
• ❌ Never use thread tape or sealant on the cone end, and never re-use a flare that has been over-tightened or distorted.

Applications and Industries

The JIC 74 degree cone sealing adapter 1CJ/1DJ appears wherever a metric ported block meets an American-style JIC flare line.

• Imported equipment integration. Machines with JIC flare connections are connected to metric ported blocks with one part number per joint.
• Repair and replacement. A damaged adapter at a metric-to-JIC junction is replaced with the same row, keeping the thread, tube size and pressure class.
• Test rigs and benches. Instrumentation lines are re-terminated from metric to JIC without changing the block.
• Mobile and construction machinery. JIC flare connections are common on North American equipment, and the heavy S series rows cover the higher pressure circuits.
• Industrial plant. Lubrication, cooling and clamp circuits use these adapters where JIC hoses meet metric manifolds.

Tags: hydraulic adapter, JIC 74 degree cone adapter, SAE J514 adapter, metric to JIC adapter, 74 degree cone sealing, light series L, heavy series S, straight hydraulic fitting.

OEM Customization and Quality Traceability

We manufacture matching hydraulic adapters and hose assemblies alongside our hose range, so specials are quoted engineering work rather than a favour. Laser marking of your part number, logo, date code and batch code is available on the body or the hex, and custom finishes, non-standard thread combinations, special body lengths and alternative seat angles are quoted from your drawing or sample, normally within 24 hours.

Every batch is traceable from raw material to finished part. Batch records, dimensional results and material test reports are available with the goods, third-party inspection such as BV or SGS can be arranged, and finished assemblies are pressure tested with results recorded for the lot. Ordering the JIC 74 degree cone sealing adapter 1CJ/1DJ on a repeat schedule keeps one drawing, one seat specification and one traceability record behind every JIC joint.

FAQ

Q: Is a JIC 74 degree cone the same as a metric 74 degree cone? A: No. Both systems use a 74 degree included cone, but the thread form and the seat dimensions differ: the JIC end here is an inch UN/UNF thread such as 7/16″X20 or 1.5/16″X12, while a metric 74 degree cone part uses a metric thread. The two seat systems are not interchangeable even when the nominal size looks close.

Q: Can I use this adapter in a 60 degree cone port? A: No. A 60 degree cone seat has a different included angle from the 74 degree JIC seat, so the adapter will sit on the seat incorrectly and will not seal. Use an adapter built for the 60 degree cone system.

Q: Can I use this adapter in an ISO 6149 O-ring port? A: No. An ISO 6149 port seals with an O-ring on a flat face, while this end seals on a 74 degree cone seat. The sealing principles and the port preparations are different.

Q: What pressure can the JIC 74 degree cone sealing adapter 1CJ/1DJ take? A: Read the pressure class printed for your row: 31.5 MPa or 16 MPa in the light L group and 63 MPa, 40 MPa or 31.5 MPa in the heavy S group. That class covers both ends and the tube range in the same row, and the finished assembly is only as strong as its weakest member.

Q: What do the numbers in the part number mean? A: The prefix states the series, the middle group is the metric thread at E, and the final group is the JIC size at F. For example 1CJ-22-08 is an M22X1.5 metric end with a 3/4″X16 JIC end, and 1DJ-24-10 is an M24X1.5 metric end with a 7/8″X14 JIC end.

Q: Why are two rows printed with unexpected codes? A: Rows 1CJ-36-36 and 1DJ-52-24 are reproduced exactly as printed on the data sheet, including the metric end M42X2 on 1DJ-52-24. Quote the row with its thread callout so the combination is unambiguous.

Q: How do I convert the pressure class to psi? A: At 1 MPa about 145 psi, 31.5 MPa is roughly 4,570 psi, 16 MPa about 2,320 psi, 40 MPa about 5,800 psi and 63 MPa about 9,135 psi.

Q: Can you supply the matching JIC flare hose ends? A: Yes. We supply hydraulic hose assemblies with JIC flare ends to match these adapters, and made-to-drawing specials are normally quoted within 24 hours.

Request a Quote

Send the metric thread, the JIC thread with its size and pitch, the tube outside diameter, the series and pressure class needed, and the material and surface treatment you require. To speed up a quotation on the JIC 74 degree cone sealing adapter 1CJ/1DJ, add the drawing and a photograph of the cone seat. We reply with part number, printed pressure class, confirmed dimensions, price and lead time within 24 hours, and trial samples can be arranged at the same time.

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