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The 1CO/1DO UN/UNF thread studs are high-pressure hydraulic fittings engineered for leak-proof connections, featuring a compact design with O-ring face sealing. Classified as straight male stud fittings, their "1CO" and "1DO" designations denote specific models within a hydraulic fitting series, tailored for reliable fluid power transmission.
Compliant with ISO 11926 standards, these fittings use UN (Unified National Coarse) or UNF (Unified National Fine) threads to ensure robust mechanical engagement with female ports. The sealing mechanism relies on an O-ring (NBR, Viton, or EPDM) seated in a facial groove, compressed against the female port’s flat face to form a dynamic, leak-tight seal.
Crafted from high-strength carbon steel with corrosion-resistant zinc-nickel plating, they withstand continuous service up to 6000 psi (400 bar), making them ideal for high-pressure hydraulic systems. Suitable for heavy equipment, machine tools, and industrial machinery, they deliver consistent performance in applications demanding compact, reliable connections. Balancing standardized compatibility, high-pressure durability, and secure sealing, the 1CO/1DO studs are trusted components for critical hydraulic system integrations.
| PART NO. | THREAD | TUBE O.D. | DIMENSIONS | MPa | |||||||
| E | F | D1 | B | 11 | L1 | S1 | S2 | ||||
| 1CO-14-04 | M14X1.5 | 7/16"X20 | 8 | 9 | 10 | 25 | 17 | 17 | 31.5 L series | ||
| 1CO-16-04 | M16X1.5 | 7/16"×20 | 10 | 9 | 11 | 26 | 17 | 19 | |||
| 1CO-18-06 | M18X1.5 | 9/16"×18 | 12 | 10 | 11 | 26 | 19 | 22 | |||
| 1CO-18-08 | M18X1.5 | 3/4"×16 | 12 | 11 | 13 | 28 | 24 | 22 | |||
| 1CO-18-10 | M18X1.5 | 7/8"X14 | 12 | 12.7 | 14.3 | 29 | 27 | 22 | |||
| 1CO-22-08 | M22X1.5 | 3/4"×16 | 15 | 11 | 14 | 29 | 24 | 27 | |||
| 1CO-22-10 | M22X1.5 | 7/8"X14 | 15 | 12.7 | 15.3 | 30 | 27 | 27 | |||
| 1CO-22-12 | M22X1.5 | 1.1/16"×12 | 15 | 15.09 | 11.91 | 30 | 32 | 27 | |||
| 1CO-26-08 | M26X1.5 | 3/4"X16 | 18 | 11 | 14.5 | 31 | 27 | 32 | |||
| 1CO-26-10 | M26X1.5 | 7/8"X14 | 18 | 12.7 | 14.8 | 31 | 27 | 32 | |||
| 1CO-30-08 | M30X2 | 3/4"×16 | 18 | 11.13 | 13.87 | 33 | 32 | 36 | 16 L series | ||
| 1CO-30-10 | M30X2 | 7/8"×14 | 22 | 12.7 | 16.8 | 33 | 32 | 36 | |||
| 1CO-30-12 | M30×2 | 1.1/16"X12 | 22 | 15 | 16.5 | 33 | 32 | 36 | |||
| 1CO-30-16 | M30X2 | 1.5/16"X12 | 22 | 15 | 17.5 | 34 | 41 | 36 | |||
| 1CO-36-12 | M36X2 | 1.1/16"X12 | 28 | 15.09 | 14.41 | 34 | 41 | 41 | |||
| 1CO-36-16 | M36X2 | 1.5/16"×12 | 28 | 15 | 17.5 | 34 | 41 | 41 | |||
| 1CO-45-16 | M45X2 | 1.5/16"×12 | 35 | 15 | 17.5 | 39 | 46 | 50 | |||
| 1CO-45-20 | M45×2 | 1.5/8"×12 | 35 | 15.09 | 16.41 | 39 | 50 | 50 | |||
| 1CO-52-20 | M52X2 | 1.5/8"X12 | 42 | 15.09 | 15.91 | 42 | 55 | 60 | |||
| 1DO-16-04 | M16X1.5 | 7/16"X20 | 8 | 9 | 15 | 30 | 17 | 19 | 63 S series | ||
| 1DO-18-06 | M18X1.5 | 9/16"×18 | 10 | 10 | 14.5 | 31 | 19 | 22 | |||
| 1DO-20-06 | M20X1.5 | 9/16"×18 | 12 | 10 | 14.5 | 31 | 22 | 24 | |||
| 1DO-20-08 | M20X1.5 | 3/4"X16 | 12 | 11 | 17.5 | 34 | 24 | 24 | |||
| 1DO-24-08 | M24X1.5 | 3/4"×16 | 16 | 11 | 15.5 | 34 | 24 | 30 | 40 S series | ||
| 1DO-24-10 | M24X1.5 | 7/8"X14 | 16 | 12.7 | 18.8 | 37 | 27 | 30 | |||
| 1DO-30-08 | M30X2 | 3/4"X16 | 20 | 11 | 20.5 | 42 | 32 | 36 | |||
| 1DO-30-10 | M30X2 | 7/8"X14 | 20 | 12.7 | 20.8 | 42 | 32 | 36 | |||
| 1DO-30-12 | M30X2 | 1.1/16"×12 | 20 | 15 | 20.5 | 42 | 32 | 36 | |||
| 1DO-36-12 | M36X2 | 1.1/16"X12 | 25 | 15.09 | 19.91 | 47 | 41 | 46 | |||
| 1DO-36-16 | M36X2 | 1.5/16"×12 | 25 | 15 | 23 | 47 | 41 | 46 | |||
| 1DO-42-16 | M42X2 | 1.5/16"X12 | 30 | 15 | 23.5 | 50 | 46 | 50 | |||
| 1DO-42-20 | M42X2 | 1.5/8"×12 | 30 | 15 | 23.5 | 50 | 50 | 50 | |||
| 1DO-52-20 | M52X2 | 1.5/8"×12 | 38 | 15.09 | 22.9 | 53.9 | 55 | 60 | 31.5 S series | ||
| Note:In case if you are interested to order the adapter in complete set with cutting ring and nut it is necessary to insert suffix "RN"after our part no.,for example 1CO-30-10RN. | |||||||||||
The 1CO/1DO UN/UNF thread studs are high-pressure hydraulic fittings engineered for leak-proof connections, featuring a compact design with O-ring face sealing. Classified as straight male stud fittings, their "1CO" and "1DO" designations denote specific models within a hydraulic fitting series, tailored for reliable fluid power transmission.
Compliant with ISO 11926 standards, these fittings use UN (Unified National Coarse) or UNF (Unified National Fine) threads to ensure robust mechanical engagement with female ports. The sealing mechanism relies on an O-ring (NBR, Viton, or EPDM) seated in a facial groove, compressed against the female port’s flat face to form a dynamic, leak-tight seal.
Crafted from high-strength carbon steel with corrosion-resistant zinc-nickel plating, they withstand continuous service up to 6000 psi (400 bar), making them ideal for high-pressure hydraulic systems. Suitable for heavy equipment, machine tools, and industrial machinery, they deliver consistent performance in applications demanding compact, reliable connections. Balancing standardized compatibility, high-pressure durability, and secure sealing, the 1CO/1DO studs are trusted components for critical hydraulic system integrations.
| PART NO. | THREAD | TUBE O.D. | DIMENSIONS | MPa | |||||||
| E | F | D1 | B | 11 | L1 | S1 | S2 | ||||
| 1CO-14-04 | M14X1.5 | 7/16"X20 | 8 | 9 | 10 | 25 | 17 | 17 | 31.5 L series | ||
| 1CO-16-04 | M16X1.5 | 7/16"×20 | 10 | 9 | 11 | 26 | 17 | 19 | |||
| 1CO-18-06 | M18X1.5 | 9/16"×18 | 12 | 10 | 11 | 26 | 19 | 22 | |||
| 1CO-18-08 | M18X1.5 | 3/4"×16 | 12 | 11 | 13 | 28 | 24 | 22 | |||
| 1CO-18-10 | M18X1.5 | 7/8"X14 | 12 | 12.7 | 14.3 | 29 | 27 | 22 | |||
| 1CO-22-08 | M22X1.5 | 3/4"×16 | 15 | 11 | 14 | 29 | 24 | 27 | |||
| 1CO-22-10 | M22X1.5 | 7/8"X14 | 15 | 12.7 | 15.3 | 30 | 27 | 27 | |||
| 1CO-22-12 | M22X1.5 | 1.1/16"×12 | 15 | 15.09 | 11.91 | 30 | 32 | 27 | |||
| 1CO-26-08 | M26X1.5 | 3/4"X16 | 18 | 11 | 14.5 | 31 | 27 | 32 | |||
| 1CO-26-10 | M26X1.5 | 7/8"X14 | 18 | 12.7 | 14.8 | 31 | 27 | 32 | |||
| 1CO-30-08 | M30X2 | 3/4"×16 | 18 | 11.13 | 13.87 | 33 | 32 | 36 | 16 L series | ||
| 1CO-30-10 | M30X2 | 7/8"×14 | 22 | 12.7 | 16.8 | 33 | 32 | 36 | |||
| 1CO-30-12 | M30×2 | 1.1/16"X12 | 22 | 15 | 16.5 | 33 | 32 | 36 | |||
| 1CO-30-16 | M30X2 | 1.5/16"X12 | 22 | 15 | 17.5 | 34 | 41 | 36 | |||
| 1CO-36-12 | M36X2 | 1.1/16"X12 | 28 | 15.09 | 14.41 | 34 | 41 | 41 | |||
| 1CO-36-16 | M36X2 | 1.5/16"×12 | 28 | 15 | 17.5 | 34 | 41 | 41 | |||
| 1CO-45-16 | M45X2 | 1.5/16"×12 | 35 | 15 | 17.5 | 39 | 46 | 50 | |||
| 1CO-45-20 | M45×2 | 1.5/8"×12 | 35 | 15.09 | 16.41 | 39 | 50 | 50 | |||
| 1CO-52-20 | M52X2 | 1.5/8"X12 | 42 | 15.09 | 15.91 | 42 | 55 | 60 | |||
| 1DO-16-04 | M16X1.5 | 7/16"X20 | 8 | 9 | 15 | 30 | 17 | 19 | 63 S series | ||
| 1DO-18-06 | M18X1.5 | 9/16"×18 | 10 | 10 | 14.5 | 31 | 19 | 22 | |||
| 1DO-20-06 | M20X1.5 | 9/16"×18 | 12 | 10 | 14.5 | 31 | 22 | 24 | |||
| 1DO-20-08 | M20X1.5 | 3/4"X16 | 12 | 11 | 17.5 | 34 | 24 | 24 | |||
| 1DO-24-08 | M24X1.5 | 3/4"×16 | 16 | 11 | 15.5 | 34 | 24 | 30 | 40 S series | ||
| 1DO-24-10 | M24X1.5 | 7/8"X14 | 16 | 12.7 | 18.8 | 37 | 27 | 30 | |||
| 1DO-30-08 | M30X2 | 3/4"X16 | 20 | 11 | 20.5 | 42 | 32 | 36 | |||
| 1DO-30-10 | M30X2 | 7/8"X14 | 20 | 12.7 | 20.8 | 42 | 32 | 36 | |||
| 1DO-30-12 | M30X2 | 1.1/16"×12 | 20 | 15 | 20.5 | 42 | 32 | 36 | |||
| 1DO-36-12 | M36X2 | 1.1/16"X12 | 25 | 15.09 | 19.91 | 47 | 41 | 46 | |||
| 1DO-36-16 | M36X2 | 1.5/16"×12 | 25 | 15 | 23 | 47 | 41 | 46 | |||
| 1DO-42-16 | M42X2 | 1.5/16"X12 | 30 | 15 | 23.5 | 50 | 46 | 50 | |||
| 1DO-42-20 | M42X2 | 1.5/8"×12 | 30 | 15 | 23.5 | 50 | 50 | 50 | |||
| 1DO-52-20 | M52X2 | 1.5/8"×12 | 38 | 15.09 | 22.9 | 53.9 | 55 | 60 | 31.5 S series | ||
| Note:In case if you are interested to order the adapter in complete set with cutting ring and nut it is necessary to insert suffix "RN"after our part no.,for example 1CO-30-10RN. | |||||||||||
