JIC 37° Male x Metric Komatsu Male Straight Adaptor

JIC 37° one end, Komatsu metric 30° flare the other. Sized for the Japanese-built excavators and loaders that run the Komatsu-style flare rather than a JIC or a DIN cone.

Brand: Ayrtec – mild steel body with a plated finish, manufactured to the standards listed below.

Watch: How to assemble Hydraulic Hose Fittings Introduction Identification and Guide on JIC thread Type

Thread Standards

• JIC 37° Male – SAE J514 37° flare. It seals metal-to-metal on the 37° cone, so it takes no tape at all.
• Metric Komatsu Male (JIS metric) – JIS metric 30° flare pattern used by Komatsu. It seals on the 30° flare seat, which is a different angle again to JIC or metric 24°.

How to Choose

• The Komatsu end is a 30° flare. It is not a JIC 37° and it is not a DIN 24°, even though all three sit in the same size range.
• Hold the old fitting nose to nose against the new one. Seven degrees does not show on its own but it shows clearly when the two cones are put together.
• The metric thread on the Komatsu end is coarse compared with a JIC. If it will not start by hand, stop rather than forcing it.

Technicians Advice

This is the fitting that gets mixed up most often in a workshop drawer, because a 30° Komatsu flare and a 37° JIC will both start into the wrong female. It will even hold static pressure on a test. Under load it frets the seat and blows out, so identify it properly at the bench rather than on the machine.

Where You’ll Find It

• JIC 37° Male – Hose ends and ports on imported US and Asian machinery – Caterpillar, John Deere, Case IH, New Holland, Bobcat, Kubota, Takeuchi.
• Metric Komatsu Male (JIS metric) – Komatsu excavators, dozers and loaders, and other Japanese plant using the JIS metric flare.

Cross-Reference

• JIC 37° Male – SAE J514 / ISO 8434-2 37° flare. Parker call this series Triple-Lok. The industrial cousin of the AN 37° flare used in aviation and motorsport.
• Metric Komatsu Male (JIS metric) – JIS metric 30° flare, commonly called Komatsu metric. Not interchangeable with DIN 2353 24° cone or JIC 37°.

Parker, Gates, Aeroquip and Ryco all manufacture to these same standards under their own part numbering, so a fitting built to the standard above will mate with theirs.

Cross-references are given at series level as a guide to the standard, not as a part-for-part substitution. Always confirm the thread form, size and seal type against the port before ordering.

📐Dimensions & thread sizes – every size in this range

← Swipe the table sideways to see every measurement →

Part code	A	B	F1	F2	L	S	C1	C2	D1	D2	Material	Finish
JIM-MKM-2133	1.5/16" JIC	M33x1.5	1.5/16" JIC	M33x1.5	64mm	36mm	23.14mm	30.00mm	20.00mm	20.00mm	Mild steel	Plated finish

Key: L overall length, S hex across flats, C1 across corners 1, C2 across corners 2, D1 bore 1, D2 bore 2. Measurements in millimetres unless shown otherwise. Thread columns show what each end mates with. Dimensions are nominal – check critical clearances against the part.

Downloads

📄 Thread Identification Chart (PDF)

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