JIS Metric Male 60 Degree Cone to BSPT Male Adapter 1KT-SP (JIS B 8363 60° Cone / BSPT)

Why This JIS Metric Male 60 Degree Cone to BSPT Male Adapter 1KT-SP Passes the Compliance Gate

The JIS metric male 60 degree cone to BSPT male adapter 1KT-SP joins a 60 degree cone seat, the sealing principle used on Japanese-built hydraulic equipment, to a male taper pipe thread (BSPT) on the other end. One end seals by metal-to-metal contact of a 60 degree cone on a matching seat; the other end seals on the tapered thread turns.

That combination exists because Japanese machines and valves are widely piped with British taper thread accessories. A 1KT-SP lets a 60 degree cone port feed BSPT pipework, or lets a BSPT line terminate at a 60 degree cone seat, without a stack of adapters and without mixing two sealing methods in one joint at each end of the adapter.

Three points decide whether this is the right part:

• The cone end is a 60 degree seat, not the 74 degree flare seat of the SAE J514 family and not the 24 degree cone of the DIN 2353 family. The seat has to match the mating half exactly.
• The thread at the cone end is a metric fine thread, from M14X1.5 to M42X1.5, with the 1.5 mm pitch held across the whole series.
• The other end is BSPT, a 55 degree taper sealing pipe thread to ISO 7-1 / GB/T 7306, historically written R1/4″, R1/2″ and so on.

Thirteen size combinations are published, from M14X1.5 with R1/4″X19 up to M42X1.5 with R1.1/2″X11.

Core Advantages

1. Two sealing systems, one body. A 60 degree cone seat on one end and a BSPT male thread on the other, with no intermediate adapter.
2. Japanese equipment compatibility. Machined for the 60 degree cone seat used on JIS-style ports.
3. Metric fine threads throughout the cone end. M14X1.5 to M42X1.5, so tooling and gauges stay metric.
4. Thirteen published combinations. Covering tube and port sizes normally seen on Japanese and British piped machines.
5. Straight body, easy access. The straight form keeps both wrench positions open in tight assemblies.
6. Traceable production. Batch marking, pressure testing in the standard workflow, material certificates on request.

Technical Specifications

What Is a JIS Metric Male 60 Degree Cone to BSPT Male Adapter?

The JIS metric male 60 degree cone to BSPT male adapter 1KT-SP is a straight adapter with a 60 degree external cone stud end and a male taper pipe thread end. The cone end seals metal-to-metal on a matching 60 degree seat, while the tapered thread end seals by thread interference assisted by a thread sealant.

The 60 degree cone is the seat form associated with Japanese industrial practice and specified in the JIS B 8363 family. It is not the 74 degree cone of the SAE J514 family, and it is not the 24 degree cone of DIN 2353 or ISO 8434-1. Sending a 1KT-SP to a 74 degree port is a common and expensive mistake, so check the seat angle before ordering.

Connection 1 (Metric Male 60 Degree Cone End)

Connection 2 (BSPT Male End)

Dimensional Data

Full Dimension Table (Part Number Matrix)

All dimensions are in millimetres and are reproduced exactly as published for this series. Thread callouts are kept verbatim, with the reading of R1/4″X19 given as a 1/4″ nominal taper pipe thread at 19 threads per inch.

Thread Size and Dash Chart

Material and Heat Treatment

The series drawing states no material grade, so the following describes typical production and is confirmed on the purchase order.

Working Pressure and Operating Envelope

The published drawing carries no pressure column, so no pressure rating is claimed for this series. Working pressure is governed by the port standard together with the hose or tube grade selected, and the finished assembly is only as strong as its weakest member.

• Data sheets referenced to the connection standards (JIS B 8363 for the 60 degree cone seat, ISO 7-1 / GB/T 7306 for the taper thread) can be supplied on request.
• Each batch is pressure tested in the standard HENGHUA fitting workflow, with batch records to support the test.
• The taper thread end and the cone end are sealed by two different mechanisms, so rate the joint from the weaker of the two in the circuit.
• For safety-critical circuits, size the assembly from the lowest rated element: tube, cone seat, port or body.

Temperature Range

A typical service window for a steel fitting with a metal-to-metal cone joint is -40 degrees C to +120 degrees C. The BSPT end relies on a sealant as well as the thread, so confirm that the sealant suits the temperature and the fluid. The real limit is set by the sealant, the seat and the connected hose or tube, not by the fitting body alone.

How to Read the Part Number Matrix

The JIS metric male 60 degree cone to BSPT male adapter 1KT-SP is coded with a series prefix, a size pair and a suffix.

1KT marks a straight adapter with a 60 degree cone stud end and a taper pipe thread end, the first number is the metric thread size, the second pair is the pipe size in eighths of an inch, and SP confirms the taper thread end.

Selection and Ordering

Selection Checklist / Decision Table

Confirm the following points before ordering the JIS metric male 60 degree cone to BSPT male adapter 1KT-SP.

Cross Reference Service

Send a photograph of the failed adapter with the cone end measured and the pipe thread gauged, and we will identify the correct row free of charge, normally within 24 hours. We do not copy or re-label another company’s brand; we match the interface and the drawing.

Packaging and Logistics

Individual poly bags with size labels or bulk bags per size, carton marking with batch and heat number, mixed-size consolidation in one shipment, and air freight or courier for urgent requirements. Material certificates and inspection reports travel with the goods on request.

Installation and Fitment Guide

Step-by-Step Assembly

1. Confirm the seat angle. Check that the port is a 60 degree cone seat and that the thread matches the E column of the table before anything is assembled.
2. Inspect the cone and the seat. Reject nicks, burrs or plating damage; a metal-to-metal cone seat cannot be recovered by extra torque.
3. Clean the cone, the seat and both threads. Flush the pipework and wipe the cone with a lint-free cloth.
4. Fit the taper thread end first. Apply a sealant compatible with the system fluid to the BSPT thread, start it by hand, and run it in until it seats with light wrench force.
5. Tighten the 60 degree cone end to the torque value for the thread size, holding the body on the S1 flats with a second wrench.
6. Leak test at working pressure and check both ends, then re-check after the first thermal cycle.

Torque and Sealing Notes

• Use the torque figure published for the thread size and material; cone seats are sensitive to over-torque.
• The 60 degree cone seals metal-to-metal and uses no sealant; the BSPT end needs a sealant or a sealing washer arrangement.
• Hold the body with a backing wrench so tightening one end does not disturb the other.
• A BSPT joint is assembled to the engagement depth that produces a dry joint, not to the point of thread deformation.

Installation Warnings

• ✔ Confirm the seat is 60 degree cone and not 74 degree or 24 degree.
• ✔ Check both thread sizes with gauges before assembly.
• ✔ Use a sealant compatible with the fluid and the temperature range.
• ✔ Support the pipework so the adapter carries no bending load.
• ❌ Never force a 60 degree cone into a 74 degree or 24 degree seat; the threads may engage but the joint will not seal.
• ❌ Never substitute 1CT-SP for a 60 degree cone connection, or use this adapter for a BSPT-to-BSPT joint.
• ❌ Never substitute a BSPP (G) fitting for the BSPT end; a parallel thread will not seal in a taper port.
• ❌ Never exceed the torque table value to stop a leak.

Applications and Industries

The JIS metric male 60 degree cone to BSPT male adapter 1KT-SP is used wherever Japanese-built 60 degree cone ports meet British taper thread pipework.

Industry tags: hydraulics, Japanese machinery, repair workshops, test benches, construction machinery, marine, mining, plant maintenance.

OEM Customization and Quality Traceability

HENGHUA produces hydraulic adapters and complete hose assemblies alongside its Globhose hose programme, so this adapter can be supplied alone or built into a tested assembly.

• Laser marking and private labelling with customer logo, part number and lot code.
• Custom surface treatment including trivalent zinc and Zn-Ni.
• Drawing or sample based production, with quotation typically within 24 hours.
• Batch traceability from heat number to carton label.
• Testing and documentation: pressure testing in the standard workflow, material certificates, and BV or SGS inspection on request.

FAQ

Q: How can I tell a JIS 60 degree cone from a 74 degree cone? A: By the seat angle, not by the thread. A 74 degree seat is the SAE J514 flare family, while the JIS 60 degree cone seat follows the JIS B 8363 family. Measure the seat angle or send a sample photograph before ordering.

Q: Is the 60 degree cone end the same as a BSPT thread? A: No. They are two different sealing methods on the same adapter. The cone end seals metal-to-metal on a 60 degree seat, while the BSPT end is a taper thread that seals on the thread turns with a sealant.

Q: Is this the same as 1CT-SP? A: No. 1CT-SP is a BSPT male adapter without a 60 degree cone end, so it cannot connect to a 60 degree cone seat. Use 1KT-SP when one side is a 60 degree cone port.

Q: What pressure does the adapter hold? A: The drawing carries no pressure column, so no rating is claimed. Working pressure depends on the port standard and the hose or tube grade, and the assembly is only as strong as its weakest member. A standards-referenced data sheet is available on request.

Q: What material is it made from? A: Typical production is carbon steel with trivalent zinc plating. Stainless steel 304 or 316L and coatings such as Zn-Ni are available on request; confirm the grade on the purchase order.

Q: Do I need sealant, and where? A: Sealant is used on the BSPT end only, and it must be compatible with the system fluid. The 60 degree cone end seals metal-to-metal and does not use sealant.

Q: What torque should I apply, and how do I hold the body? A: Use the published torque for the thread size and material and hold the body on the S1 flats with a second wrench. Request the torque table for your size with the order.

Q: What is the delivery time for the JIS metric male 60 degree cone to BSPT male adapter 1KT-SP? A: Standard sizes normally ship in 7 day batches, custom samples in 48 hours, and mixed sizes can be consolidated in one shipment. Quotations are answered within 24 hours.

Request a Quote

Send the 60 degree cone thread size, the BSPT size, the material or surface treatment and the quantity, and we will confirm the correct row of the JIS metric male 60 degree cone to BSPT male adapter 1KT-SP matrix, normally within 24 hours. If you are unsure whether the port is a 60 degree or 74 degree seat, send a photograph with the seat measured and we will identify the correct series free of charge.

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