DK KOMATSU Fittings (P91)/(P92)

KOMATSU straight fittings with metric thread and 60-degree cone 

Straight fittings with 60-degree internal cone⁰  and internal metric thread. The so-called "concave" cone called a funnel, the same as for DKJ (C91) fittings. Metric DK fittings are rare. The P91 designation is found in Poland, which indicates the type of DK KOMATSU fittings ( P91=DK KOMATSU ) This type of fitting is most common in Chinese-made machines. The fittings are designed for crimping on hydraulic hoses. Material: free-cutting steel, zinc-plated. DN=internal hose size. KOMATSU fittings are available in straight and 90-degree elbow versions. In Poland, this type of fitting is referred to as P91, meaning a straight fitting, and P92, meaning a 90-degree elbow fitting.  

JIS - metric straight KOMATSU fitting with 60º cone

The KOMATSU JIS fitting is a hydraulic hose fitting used in pressure systems. It features a metric thread and a 60º conical seal. It is a standard used in Japanese machines, including the Komatsu brand, and provides precise and durable connections in hydraulic systems. KOMATSU JIS fittings are used in hydraulic systems, particularly in Japanese and Asian machinery brands such as: Komatsu: Construction machinery (excavators, loaders). Hitachi and Kubota: Agricultural and industrial equipment. Power hydraulics industry: Connections of high-pressure hoses in power and control systems. Industries: Construction: Heavy machinery, including excavators and loaders. Agricultural industry: Harvesters, tractors. Transport industry: Trucks, semi-trailers with hydraulic installations. Machinery industry: Drive and control systems.

KOMATSU fittings specification 

• Thread: Metric, compliant with JIS (Japanese Industrial Standards).
• Cone angle: 60º, ensuring effective sealing for conical connections.
• Shape: Straight fitting with external metric thread and conical seal on the tip.
• Material: High-quality carbon steel with zinc coating, which increases corrosion resistance. Optional stainless steel for use in harsh environmental conditions. 
• Standard: Compliance with the Japanese JIS B8363 standard.

Technical parameters:

• Thread: internal metric JIS (e.g. M14x1.5, M16x1.5).
• Cone: 60º cone seal.
• Material: carbon steel with zinc coating.
• Working pressure: up to 400 bar depending on size.
• Temperature range: from -40°C to +120°C (with NBR seal).
• Fitting matches: ADK KOMATSU fitting with external thread

Example designations according to other manufacturers:

• Parker: JIS 60° Male Stud.
• Interpump: Straight Metric Komatsu JIS.