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The 1CH/1DH is a precision-engineered ISO 6149 GEO series metric thread stud end, designed for reliable straight connections between hydraulic tubes and female metric ports in high-pressure hydraulic systems. It addresses the adaptation challenge between pipelines and standard metric interfaces in industrial equipment. With a standardized design that balances sealing performance and installation versatility, it serves as a core connection component for high-pressure fluid systems such as construction machinery and industrial hydraulic equipment.

Dual-End Integrated Adaptation Structure: Features a differentiated dual-end design: one end is a metric male thread with an integrated O-ring, while the other is a 24° cone connection end. It adapts to both ISO 6149 female metric ports and DIN 2353 standard 24° cone pipelines, enabling seamless connection between two connection forms without additional adapters.
Dual Zero-Leak Sealing System: The metric threaded end incorporates an O-ring seal, forming a high-pressure-resistant sealing interface when matched with ISO 6149 standard ports. The 24° cone end can be paired with a cutting ring for flareless sealing. This dual-seal structure maintains stable zero-leak performance even under high-pressure conditions, effectively resisting system pressure fluctuations.
Universal Compatibility Across Industries: Manufactured in strict compliance with ISO 6149, DIN, and SAE J2244 international standards, it offers direct compatibility with mainstream industrial hydraulic tubes, cutting rings and port components worldwide, eliminating the need for custom modifications to integrate into existing systems.
Standard Compliance: Conforms to ISO 6149, DIN, and SAE J2244 international standards, ensuring universal adaptability for global industrial applications
Material Technology: Precision-forged from high-strength carbon steel or stainless steel with anti-corrosion surface treatment, delivering excellent impact, fatigue and corrosion resistance for harsh industrial environments
Sealing Performance: Dual-seal design with O-ring and 24° cone face, ensuring zero leakage under high-pressure conditions and stable long-term operation
Adaptation Range: One end fits ISO 6149 female metric ports, while the other is compatible with DIN 2353 standard 24° cone pipelines, covering a wide range of tube sizes
Durability: Rugged construction resists long-term high-pressure impact and repeated assembly/disassembly, extending equipment service life and reducing maintenance costs
Construction Machinery Hydraulic Systems: Straight connections between hydraulic tubes and female metric ports on excavators, loaders, cranes and other equipment, adapting to high-pressure shock conditions to ensure stable system operation
Inustrial Hydraulic Station Retrofits: Adaptation upgrades between pipelines and standard metric ports on old hydraulic equipment, enabling interface connections without full disassembly to reduce downtime for modifications
Marine & Offshore Engineering Equipment: Hydraulic line connections for deck machinery and steering systems, with corrosion and impact resistance to adapt to humid and high salt-spray marine environments
Metallurgical & Mining High-Pressure Equipment: High-pressure hydraulic line connections for metallurgical and mining machinery, withstanding heavy loads and vibration to ensure zero-leakage operation of high-pressure systems
Industrial Automation Fluid Systems: Interface connections for hydraulic circuits in automated equipment, with standardized design suitable for mass production scenarios, offering convenient and reliable installation
| PART NO. | THREAD | TUBE O.D. | O RING | DIMENSIONS | MPa | |||||||
| E | F | B | 11 | L1 | S1 | S2 | ||||||
| 1CH-12-10 | M12X1.5 | M10X1 | 6 | O08.1X1.6 | 8.5 | 9.5 | 23 | 14 | 14 | 31.5 L series | ||
| 1CH-14 | M14×1.5 | M14X1.5 | 8 | 011.3X2.4 | 11 | 10 | 25 | 19 | 17 | |||
| 1CH-14-12 | M14X1.5 | M12X1.5 | 8 | 009.3X2.4 | 11 | 10 | 25 | 17 | 17 | |||
| 1CH-16-14 | M16X1.5 | M14X1.5 | 10 | 011.3X2.4 | 11 | 13 | 26 | 19 | 19 | |||
| 1CH-18-14 | M18X1.5 | M14X1.5 | 12 | 011.3X2.4 | 11 | 11 | 25.5 | 19 | 22 | |||
| 1CH-14-18 | M14X1.5 | M18X1.5 | 8 | O15.3X2.4 | 12.5 | 11.5 | 26.5 | 24 | 17 | |||
| 1CH-16 | M16X1.5 | M16X1.5 | 10 | 013.3X2.4 | 11.5 | 13 | 28 | 22 | 19 | |||
| 1CH-16-18 | M16X1.5 | M18X1.5 | 10 | 015.3X2.4 | 12.5 | 12.5 | 28 | 24 | 19 | |||
| 1CH-18-16 | M18X1.5 | M16X1.5 | 12 | 013.3X2.4 | 11.5 | 12 | 27 | 22 | 22 | |||
| 1CH-22-16 | M22X1.5 | M16X1.5 | 15 | 013.3X2.4 | 11.5 | 13.5 | 29.5 | 24 | 27 | |||
| 1CH-22-18 | M22X1.5 | M18X1.5 | 15 | 015.3X2.4 | 12.5 | 13.5 | 29 | 24 | 27 | |||
| 1CH-16-22 | M16X1.5 | M22X1.5 | 10 | 019.3X2.4 | 13 | 14 | 29.5 | 27 | 19 | |||
| 1CH-22-20 | M22X1.5 | M20X1.5 | 15 | 017.3X2.4 | 12 | 15 | 30.5 | 27 | 27 | |||
| 1CH-22 | M22X1.5 | M22X1.5 | 15 | 019.3X2.4 | 13 | 15 | 31 | 27 | 27 | |||
| 1CH-26-22 | M26X1.5 | M22X1.5 | 18 | 019.3X2.4 | 13 | 14.5 | 31 | 27 | 32 | |||
| 1CH-26 | M26X1.5 | M26X1.5 | 18 | 023.5X3.0 | 13.5 | 13.5 | 31 | 32 | 32 | |||
| 1CH-26-27 | M26X1.5 | M27X2 | 18 | O23.5X3.0 | 16 | 14.5 | 32 | 32 | 32 | |||
| 1CH-26-33 | M26X1.5 | M33X2 | 18 | O29.5X3.0 | 16 | 15.5 | 33 | 41 | 32 | |||
| 1CH-30-22 | M30×2 | M22X1.5 | 22 | 019.3X2.4 | 13 | 17.5 | 33 | 32 | 41 | 16 L series | ||
| 1CH-30-27 | M30×2 | M27X2 | 22 | O23.5X3.0 | 16 | 16.5 | 33 | 32 | 36 | |||
| 1CH-30 | M30×2 | M30×2 | 22 | O26.5X3.0 | 16 | 17.5 | 33 | 36 | 36 | |||
| 1CH-36-27 | M36X2 | M27X2 | 28 | O23.5X3.0 | 16 | 17.5 | 34 | 41 | 41 | |||
| 1CH-36-33 | M36X2 | M33X2 | 28 | O29.5X3.0 | 16 | 17.5 | 34 | 41 | 41 | |||
| 1CH-36-42 | M36X2 | M42X2 | 28 | O38.5X3.0 | 16 | 18.5 | 35 | 50 | 41 | |||
| 1CH-45-33 | M45×2 | M33X2 | 35 | O29.5X3.0 | 16 | 17.5 | 37 | 46 | 50 | |||
| 1CH-45-42 | M45×2 | M42×2 | 35 | O38.5X3.0 | 16 | 17.5 | 37 | 50 | 50 | |||
| 1CH-52-48 | M52X2 | M48X2 | 42 | 044.5X3.0 | 17.5 | 19 | 45 | 55 | 60 | |||
| 1DH-14 | M14X1.5 | M14X1.5 | 6 | 011.3X2.4 | 11 | 15 | 28 | 19 | 17 | 63 S series | ||
| 1DH-14-12 | M14X1.5 | M12X1.5 | 6 | 009.3X2.4 | 11 | 13 | 28 | 17 | 17 | |||
| 1DH-16-14 | M16X1.5 | M14X1.5 | 8 | 011.3X2.4 | 11 | 15 | 30 | 19 | 19 | |||
| 1DH-18-16 | M18X1.5 | M16X1.5 | 10 | 013.3X2.4 | 11.5 | 15 | 31 | 22 | 22 | |||
| 1DH-20-14 | M20X1.5 | M14X1.5 | 12 | 011.3X2.4 | 11 | 15 | 31 | 22 | 24 | |||
| 1DH-20-16 | M20X1.5 | M16X1.5 | 12 | 013.3X2.4 | 11.5 | 15 | 31 | 22 | 24 | |||
| 1DH-20-18 | M20X1.5 | M18X1.5 | 12 | 015.3X2.4 | 12.5 | 17 | 33 | 24 | 24 | |||
| 1DH-20-22 | M20X1.5 | M22X1.5 | 12 | 019.3X2.4 | 13 | 17.5 | 35 | 27 | 30 | |||
| 1DH-24-22 | M24X1.5 | M22X1.5 | 16 | 019.3X2.4 | 13 | 18.5 | 37 | 27 | 30 | 40 S series | ||
| 1DH-30 | M30X2 | M30X2 | 20 | 026.5X3.0 | 16 | 20.5 | 42 | 36 | 36 | |||
| 1DH-30-27 | M30X2 | M27X2 | 20 | 023.5X3.0 | 16 | 20.5 | 42 | 32 | 36 | |||
| 1DH-30-33 | M30X2 | M33X2 | 20 | O29.5X3.0 | 16 | 22.5 | 42 | 41 | 36 | |||
| 1DH-36-27 | M36X2 | M27X2 | 25 | O23.5X3.0 | 16 | 23 | 47 | 41 | 46 | |||
| 1DH-36-33 | M36X2 | M33X2 | 25 | O29.5X3.0 | 16 | 23 | 47 | 41 | 46 | |||
| 1DH-42 | M42X2 | M42X2 | 30 | O38.5X3.0 | 16 | 23.5 | 50 | 50 | 50 | |||
| 1DH-42-48 | M42X2 | M48X2 | 30 | O44.5X3.0 | 17.5 | 26.5 | 52 | 55 | 50 | |||
| Note:In case if you are interested to order the adapter in complete set with cuting ring and nut it is necessary toinsert suffix "RN" after our part no.,for example 1DH-20-18RN. | ||||||||||||